AccessRunner ADSL-USB Modem Device Set Data Sheet

Conexant

100427B

Revision History

Revision

Date

Comments

1/27/2000

Initial release

5/4/2000

Added hardware interface tables and host interface description.

Conexant Systems, Inc.

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iii

Contents

Introduction ....................................................................................................................................................... 1-1
1.1

Overview................................................................................................................................................... 1-1

1.2

Applications .............................................................................................................................................. 1-1

1.3

Features ................................................................................................................................................... 1-3
1.3.1

P5200 USB Interface Controller Features.................................................................................. 1-3

1.3.2

CX11627 ADSL DMT Data Pump Features ............................................................................... 1-3

1.3.3

CX20431 ADSL Analog Front End Features.............................................................................. 1-4

1.3.4

CX20441 ADSL Line Driver Features ........................................................................................ 1-4

1.4

Reference Design..................................................................................................................................... 1-4

System Description........................................................................................................................................... 2-1
2.1

General Description.................................................................................................................................. 2-1
2.1.1

Boot ROM and Power Up Procedure ......................................................................................... 2-1

2.1.2

Serial EEPROM Programming Utility ......................................................................................... 2-1

2.2

ADSL Operation ....................................................................................................................................... 2-1
2.2.1

ADSL Operating Modes ............................................................................................................. 2-1

Full Rate ADSL Modes...................................................................................................... 2-1
G.lite Splitterless Mode ..................................................................................................... 2-1
LAN Mode ......................................................................................................................... 2-1
WAN Mode........................................................................................................................ 2-1

2.2.2

Host Software............................................................................................................................. 2-2

2.2.3

Control Panel ............................................................................................................................. 2-2

2.2.4

Installation Wizard ..................................................................................................................... 2-2

2.3

Device Description ................................................................................................................................... 2-2
2.3.1

P5200 UIC Description............................................................................................................... 2-2

ARM Processor ................................................................................................................. 2-2
External Memory Controller............................................................................................... 2-2
Host Interface.................................................................................................................... 2-3
ADSL Interface.................................................................................................................. 2-3
USB Interface.................................................................................................................... 2-3
LED Interface .................................................................................................................... 2-3
EEPROM Interface............................................................................................................ 2-3
General Purpose Input/Output Interface ........................................................................... 2-3

2.3.2

CX11627 ADDP Description ...................................................................................................... 2-4

ATM Transmission Convergence ...................................................................................... 2-4
Digital Interface ................................................................................................................. 2-4
QAM Encoder/Decoder ..................................................................................................... 2-4
FFT.................................................................................................................................... 2-4
Analog Front End Interface ............................................................................................... 2-4
Microcontroller Interface.................................................................................................... 2-4

2.3.3

CX20431 AFE Description ......................................................................................................... 2-5

2.3.4

CX20441 LD Description............................................................................................................ 2-6

Hardware Interface............................................................................................................................................ 3-1
3.1

P5200 UIC Hardware Interface Signals.................................................................................................... 3-1
3.1.1

P5200 UIC Signal Interface, Pin Assignments, and Signal Definitions ...................................... 3-1

P5200 UIC Electrical and Environmental Specifications .......................................................................... 3-8

3.2

CX11627 ADDP Hardware Interface Signals ......................................................................................... 3-10
3.2.1

CX11627 ADDP Hardware Signals, Pin Assignments, and Signal Definitions ........................ 3-10

3.2.2

CX11627 ADDP Electrical and Environmental Specifications ................................................. 3-17

3.3

CX20431 AFE Hardware Interface Signals ............................................................................................ 3-19
3.3.1

CX20431 AFE Hardware Signals, Pin Assignments, and Signal Definitions ........................... 3-19

3.3.2

CX20431 AFE Electrical and Environmental Specifications .................................................... 3-22

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CX20441 LD Hardware Interface Signals............................................................................................... 3-24
3.4.1

CX20441 LD Hardware Signals, Pin Assignments, and Signal Definitions.............................. 3-24

3.4.2

CX20441 LD Electrical and Environmental Specifications....................................................... 3-27

USB General Operation .................................................................................................................................... 4-1
4.1

Descriptors ............................................................................................................................................... 4-1
4.1.1

Device Descriptor....................................................................................................................... 4-1

4.1.2

Configuration Descriptor ............................................................................................................ 4-3

4.1.3

Interface Descriptor.................................................................................................................... 4-4

4.1.4

Endpoint Descriptor ................................................................................................................... 4-5

4.1.5

Enumeration............................................................................................................................... 4-6

4.1.6

Endpoint Pairs............................................................................................................................ 4-6

4.1.7

Language ID Table..................................................................................................................... 4-6

4.1.8

Manufacturer String Table.......................................................................................................... 4-6

4.1.9

Product ID String Table.............................................................................................................. 4-7

4.1.10

Serial Number String Table........................................................................................................ 4-8

Package Dimensions ........................................................................................................................................ 5-1

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Figures

Figure 1-1. AccessRunner ADSL-USB Modem Device Set Simplified Hardware Interface...................................................... 1-1
Figure 1-2. AccessRunner ADSL-USB Modem Device Set Major Interfaces ........................................................................... 1-2
Figure 2-1. P5200 UIC Block Diagram ..................................................................................................................................... 2-3
Figure 2-2. CX11627 ADDP Block Diagram ............................................................................................................................. 2-4
Figure 2-3. CX20431 AFE Block Diagram................................................................................................................................ 2-5
Figure 2-4. CX20441 LD Block Diagram .................................................................................................................................. 2-6
Figure 3-1. P5200 UIC Hardware Interface Signals ................................................................................................................. 3-2
Figure 3-2. P5200 UIC Pin Signals-176-Pin TQFP................................................................................................................... 3-3
Figure 3-3. CX11627 ADDP Hardware Interface Signals ....................................................................................................... 3-11
Figure 3-4. CX11627 ADDP Pin Signals - 176-Pin TQFP ...................................................................................................... 3-12
Figure 3-5. CX20431 AFE Hardware Interface Signals .......................................................................................................... 3-19
Figure 3-6. CX20431 AFE Pin Signals - 32-Pin TQFP ........................................................................................................... 3-19
Figure 3-7. CX20441 LD Hardware Interface Signals ............................................................................................................ 3-25
Figure 3-8. CX20441 LD Pin Signals - 32-Pin TQFP.............................................................................................................. 3-25
Figure 5-1. Package Dimensions - 176-Pin TQFP ................................................................................................................... 5-1
Figure 5-2. Package Dimensions - 32-Pin TQFP ..................................................................................................................... 5-2

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Tables

Table 1-1. AccessRunner ADSL-USB Modem Device Set Models and Part Numbers ............................................................ 1-2
Table 3-1. P5200 UIC Hardware Signal Definitions.................................................................................................................. 3-4
Table 3-2. P5200 UIC Input/Output Type Descriptions ............................................................................................................ 3-7
Table 3-3. P5200 UIC DC Electrical Characteristics ................................................................................................................ 3-8
Table 3-4. P5200 UIC Operating Conditions ............................................................................................................................ 3-9
Table 3-5. P5200 UIC Absolute Maximum Ratings .................................................................................................................. 3-9
Table 3-6. P5200 UIC Power Consumption.............................................................................................................................. 3-9
Table 3-7. CX11627 ADDP Hardware Signal Definitions ....................................................................................................... 3-13
Table 3-8. CX11627 ADDP Input/Output Type Descriptions .................................................................................................. 3-16
Table 3-9. CX11627 ADDP DC Electrical Characteristics ...................................................................................................... 3-17
Table 3-10. CX11627 ADDP Operating Conditions................................................................................................................ 3-18
Table 3-11. CX11627 ADDP Absolute Maximum Ratings ...................................................................................................... 3-18
Table 3-12. CX11627 ADDP Power Consumption ................................................................................................................. 3-18
Table 3-13. CX20431 AFE Hardware Signal Definitions ........................................................................................................ 3-20
Table 3-14. CX20431 AFE Input/Output Type Descriptions ................................................................................................... 3-21
Table 3-15. CX20431 AFE DC Electrical Characteristics ....................................................................................................... 3-22
Table 3-16. CX20431 AFE Analog Electrical Characteristics................................................................................................. 3-22
Table 3-17. CX20431 AFE Operating Conditions................................................................................................................... 3-23
Table 3-18. CX20431 AFE Absolute Maximum Ratings......................................................................................................... 3-23
Table 3-19. CX20431 AFE Power Consumption .................................................................................................................... 3-23
Table 3-20. CX20441 LD Hardware Signal Definitions........................................................................................................... 3-26
Table 3-21. CX20441 LD Input/Output Type Descriptions ..................................................................................................... 3-26
Table 3-22. CX20441 LD Analog Electrical Characteristics ................................................................................................... 3-27
Table 3-23. CX20441 LD Operating Conditions ..................................................................................................................... 3-27
Table 3-24. CX20441 LD Absolute Maximum Ratings ........................................................................................................... 3-27
Table 3-25. CX20441 LD Power Consumption....................................................................................................................... 3-27
Table 4-1. Device Descriptors .................................................................................................................................................. 4-2
Table 4-2. Configuration Descriptors........................................................................................................................................ 4-3
Table 4-3. Interface Descriptors ............................................................................................................................................... 4-4
Table 4-4. Endpoint Descriptors ............................................................................................................................................... 4-5
Table 4-5. Endpoint Pairs ......................................................................................................................................................... 4-6
Table 4-6. Language ID Table.................................................................................................................................................. 4-6
Table 4-7. Manufacturer String Table....................................................................................................................................... 4-6
Table 4-8. Product ID String Table ........................................................................................................................................... 4-7
Table 4-9. Serial Number String Table ..................................................................................................................................... 4-8

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1-1

1. Introduction

1.1 Overview

The Conexant AccessRunner

ADSL-USB Modem Device Set combines an "always-on" high speed Asymmetric Digital

Subscriber Line (ADSL) connection to the telephone line, and Universal Serial Bus (USB) connection to a host PC into a
single cost-effective solution.

Conexant's AccessRunner

ADSL modem device set is compliant with the full-rate ANSI T1.413 Issue 2 and ITU G.dmt

(G.992.1) ADSL standards, and with the splitterless ITU G.lite (G.992.2) specification. This rate-adaptive solution is designed
for Customer Premise Equipment and supports downstream data rates of up to 8 Mbps and upstream data rates of up to 1
Mbps.

The device set takes advantage of the processing power available with today's computers by eliminating the need for a
separate ATM Segmentation and Reassembly (SAR) device, resulting in a cost-effective solution suitable for both full rate and
G.lite applications. Additionally, host-based software provides support for current industry standards for PPP over ATM (RFC
2364) and bridged Ethernet over ATM (RFC 1483) for Windows 98 and Windows 2000.

The USB specification version 1.1 is supported and is the preferred standard method to connect peripherals to PCs.

During periods of no data transmission, the Conexant ADSL DMT data pump performs idle cell insertion and deletion thus
unloading this task from the host PC.

The device set consists of four devices (see Figure 1-1 and Figure 1-2):

· USB Interface Controller (UIC), part no. P5200, in a 176-pin TQFP
· ADSL DMT Data Pump (ADDP), part no. CX11627, in a 176-pin TQFP
· Analog Front End (AFE), part no. CX20431, in a 32-pin TQFP
· Line Driver (LD), part no. CX20441, in a 32-pin TQFP
ADSL (Asymmetric Digital Subscriber Line) is a transmission technology used to carry user data over a single twisted pair line
between the Central Office and the Customer Premises. The downstream (Central Office to Customer Premises) direction
typically supports a much higher data rate than the upstream or return (Customer Premises to Central Office) channel. This
asymmetric nature lends itself to applications like remote LAN access, Internet access, and video delivery. The downstream
data rates can go up to 8 Mbps. The upstream data rates can go up to 1 Mbps. Actual data rates depend on the transceiver
implementation, loop length, impairments, and transmitted power.

The Conexant ADSL-USB Modem Device Set is based upon a scalable architecture. This architecture enables the device set
to support splitterless G.lite as well as splittered and splitterless full-rate ADSL. G.lite enables telephone companies to deploy
consumer-oriented, "always on" 1.5 Mbps Internet access services without the need for splitter equipment, micro-filters, or
wiring changes at the customer premises.

1.2 Applications

· ADSL Customer Premise Equipment
· ADSL USB modems for desktop PCs
· ADSL USB modems for notebook PCs

P5200

USB Interface

Controller

(UIC)

176-Pin TQFP

CX11627

ADSL DMT

Data Pump

(ADDP)

176-Pin TQFP

CX20431

Analog Front End

(AFE)

32-Pin TQFP

TIP
RING

100428_F1-1_SID

USB

Interface

TELEPHONE LINE

CX20441

Line Driver

(LD)

32-Pin TQFP

Host-Based

ADSL

Drivers

Device Set

Figure 1-1. AccessRunner ADSL-USB Modem Device Set Simplified Hardware Interface

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1-3

1.3 Features

· Complete ADSL-USB solution
· Compliant with ADSL standards

Full-rate ANSI T1.413 Issue 2 and ITU G.dmt (G.992.1) standards

Splitterless ITU G.lite (G.992.2) specification

· DMT modulation and demodulation
· Full-rate adaptive modem

Maximum downstream rate of 8 Mbps

Maximum upstream rate of 1 Mbps

· Supports splitterless ADSL implementation
· WAN mode support: PPP over ATM (RFC 2364)
· LAN mode support: bridged Ethernet over ATM (RFC 1483)
· Tone detection for low power mode
· USB host interface

Compliant with USB Specification, Revision 1.1

USB full speed (12 Mbps)

Suspend/Resume

Vendor specific descriptors

Bus powered USB device

· ATM SAR performed in software driver
1.3.1

P5200 USB Interface Controller Features

· CX11627 ADSL DMT Data Pump (ADDP) interface
· CX20431 ADSL Analog Front End (AFE) interface
· CX20441ADSL Line Driver (LD) interface
· Internal USB interface
· SDRAM/SRAM interface
· LED interface
· Serial EEPROM interface
· JTAG interface
· 176-pin TQFP
1.3.2

CX11627 ADSL DMT Data Pump Features

· Low power (0.5W) consumption
· DSP-based programmable ADSL data pump
· No external Interleave RAM, 16 Kbytes built-in
· Echo cancellation
· Digital interface and rate buffering
· ADSL framing
· Forward Error Correction (FEC) encoding and decoding and interleaving
· Constellation encoding/decoding
· IFFT modulation and FFT demodulation
· Transmit and receive signal digital filtering
· Time domain equalization
· Frequency domain equalization
· Clock recovery
· CRC and scrambling
· Digital interface framing
· ATM mode

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2. System

Description

2.1 General

Description

The ADSL - USB modem solution hardware connects to the host PC via USB interface. The complete chipset and system
software is provided. The OEM adds a crystal circuit, EEPROM, RAM, LEDs, and other discrete components. All software to
support a full rate and/or G.lite ADSL modem is provided. Additionally, a control panel providing connection and system
status, an installation wizard providing automatic provisioning, a serial EEPROM programming utility, and a manufacturing
test program are provided.

2.1.1

Boot ROM and Power Up Procedure

The P5200 USB Interface Controller (UIC) contains a boot loader in internal ROM. Upon power up, the P52 UIC reads the
vendor specific USB descriptor information from EEPROM, and then enumerates with the host PC. EEPROM is required so
that USB descriptor information can be supplied during the enumeration process.

2.1.2

Serial EEPROM Programming Utility

The OEM-supplied serial EEPROM is required to store the USB device, configuration, interface, and endpoint descriptors. A
DOS-based EEPROM Programming Utility is available for the OEM to use to program the serial EEPROM with USB device,
configuration, interface, and endpoint descriptors. The USB device descriptors (including Vendor ID, Product ID, Device
Release Number, Manufacturer Name, Product Name, and Serial Number) can be customized as required.

2.2 ADSL

Operation

2.2.1

ADSL Operating Modes

Full Rate ADSL Modes

Both T1.413 and G.992.1 (G.dmt) line coding schemes are supported for downstream rates up to 8 Mbps and upstream rates
up to 1 Mbps in 32 kbps increments. User selection of mode is supported through the provided control panel, however, auto-
provisioning is supported so that the appropriate modulation is automatically selected based on what is supported by the DSL
Access Multiplexer (DSLAM) at the Central Office. When operating in one of the full rate modes, the low and high frequency
bands must be separated with a filter. This can be done with either a service provider-installed splitter (known as "splittered
ADSL"), or with the use of distributed micro-filters in line with each POTS device on the circuit (known as "splitterless full-rate
ADSL"). Both deployment models are supported.

G.lite Splitterless Mode

G.992.2 (G.lite) splitterless mode is supported for downstream rates up to 1.5 Mbps and upstream rates up to 512 kbps in 32
kbps increments. User selection of mode is supported through the provided control panel, however, auto-provisioning is
supported so that the appropriate modulation is automatically selected based on what is supported by the DSLAM at the
Central Office. When operating in splitterless mode, the low and high frequency bands do not need to be separated with a
filter, and neither a service provider installed splitter, nor distributed micro-filters are required.

G.lite mode supports power management by defining a set of power management states for the link and the use of the
Embedded Operations Channel (eoc) to coordinate between the ATU-R and ATU-C.

LAN Mode

RFC-1483, bridged Ethernet over ATM, is supported in the LAN driver. This protocol provides LLC encapsulation for carrying
network interconnect traffic over a single ATM AAL5 Virtual Connection. LLC encapsulation is desirable when it is not
practical to have a separate VC for each carried protocol, such as with an ATM network that only supports Permanent Virtual
Circuits (PVCs). The provided NDIS 5 drivers automatically establish a "connection-less" call using the defined PVC, and
encapsulate Ethernet bridged frames.

WAN Mode

RFC-2364, PPP over ATM, is supported in the WAN driver. Point-to-Point Protocol provides a method of transporting multi-
protocol packets over point-to-point links. Point-to-point links allow for services such as Link Control Protocol, Network-layer
Control Protocol, and authentication. The PPP over ATM standard brings these point-to-point services to the ATM network
where they are not inherently supported. The provided NDIS 5 drivers accept an empty dial string on a specific "link" or PVC
from Windows Dial-up Networking to establish a call, and encapsulate PPP frames.

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User selection of WAN or LAN mode can be done manually via the provided control panel. However, auto-configuration is
supported with the provided installation wizard, so that the protocol mode is selected properly without user intervention.

2.2.2 Host

Software

The host software NDIS miniport driver provided implements the ATM Adaptation Layer 5 (AAL5), which is composed of two
sublayers: 1) the Segmentation and Reassembly (SAR) layer, and 2) the Convergence Sublayer (CS). The AAL5 protocol
provides virtual connections, which offer error detection, but not error correction, between end stations attached to the same
network.

The SAR sublayer transmitter segments the higher layer information into a size suitable for the payload of the ATM cells of a
virtual connection. The receiver reassembles the contents of the cells of a virtual connection into data units to be delivered to
higher layers. During periods of no data transmission, the device set, and not the host software driver, performs idle cell
insertion and deletion, thus unloading this task from the host PC and unburdening the USB with unnecessary traffic.

The Convergence Sublayer performs message identification and clock recovery. Additionally, the CS of the AAL converts the
user service information coming from the upper layer into a protocol data unit (PDU), and also carry out the opposite process
at the receiver.

Unspecified Bit Rate (UBR) service is supported. It allows a connection to be established without specifying the bandwidth
expected from the connection. The network makes no guarantees for UBR service: it establishes the route but does not
commit bandwidth. UBR can be used for applications that have no delivery constraints and do their own error and flow
control. Examples of potential uses or UBR are e-mail and file transfer, as neither application has real-time characteristics.

2.2.3 Control

Panel

A Windows Control Panel Applet is provided to monitor and control ADSL line and call activity, accumulate ADSL line and call
statistics, and identify the software and connection information. The control panel provides different levels of information: 1)
User, 2) Advanced User, 3) Developer. It is intended that only the User level information, which consists of basic connection
statistics such as line rate and connect status, is available to the end user. Other information available to the Advanced User
and Developer include Physical Layer Statistics, ATM Link Statistics, AAL Link Statistics, Protocol setup, and a logging
capability, which collects performance data and logs it to disk.

2.2.4 Installation

Wizard

A Windows Installation Wizard is provided to ease the user's provisioning of the ADSL service. The Wizard allows the user to
select a service provider allowing the associated setup profile to automatically ensure proper setup and installation of the
software drivers. The profiles, based on input from various ADSL service providers, are provided to facilitate deployment and
to minimize user involvement in provisioning ADSL service. A profile contains configuration information for physical layer
options, ATM layer parameters, AAL layer parameters, and TCP/IP layer parameters.

2.3 Device

Description

2.3.1

P5200 UIC Description

The P5200 USB Interface Controller (UIC) is the bridge device between the CX11627 ADSL DMT Data Pump (ADDP) and the
host computer. It provides the control, interface, and data manipulation for the CX11627 ADDP, the CX20431 Analog Front
End (AFE), the CX20441 Line Driver (LD), and hybrid circuitry.

The P5200 has output ports for LED indicators and an interface to serial EEPROM for storing vendor specific descriptors. The
UIC conforms to the USB Specification Rev. 1.1 and supports full-speed (12 Mbps) USB device implementation.

The P5200 operates from +1.8V for core operation and +3.3V for interface circuit operation. The P5200 can operate with
+3.3V interface signals (VGG = +3.3V) or +5V interface signals (VGG = +5V).

ARM Processor

The ARM Processor provides the controller and supervisory tasks of the ADSL-USB system. It moves data between the USB
port and the ADSL interface. Control code for the ARM is executed from external memory under control of the External
Memory Controller (EMC).

External Memory Controller

The External Memory Controller (EMC) provides a 16-bit interface to support up to 8 Mbytes of external memory. SDRAM or
SRAM is supported to maintain lowest cost of external memory. There can be 1 (16 bits wide) or 2 (8 bits wide) memories that
can reside on the EMC bus. This bus is not shared with any other functions so activity on this bus can be concurrent with
asynchronous and independent USB port or ADSL data transfers.

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ADSL

Interface

ARM Processor

Control Logic

Host

Interface

GPIO

RAM

ROM

USB

Interface

External
Memory

Controller

(EMC)

SDRAM
or SRAM

USB

ADSL
Data Pump
and AFE

100427 F2-1_BD_P5200

EEPROM

Interface

EEPROM

Figure 2-1. P5200 UIC Block Diagram

Host Interface

The Host Interface is a 16-bit data and 21-bit address bus used for control of the ADSL Data Pump.

ADSL Interface

The ADSL Interface is responsible for data transfer to and from the ADSL Data Pump and the setup of the AFE.

USB Interface

The USB Interface is responsible for data transfer to and from the USB, by extracting clock and data from the USB cable. It
also handles the front end functions of the USB protocol such as Sync Field Identification, NRZI-NRZ Conversion, Bit
Stripping and Stuffing, and CRC functions. Additionally, the USB port converts the serial packet to 8-bit parallel data. Control
transfers addressed to End Point Zero are handled by the USB port.

LED Interface

GPIO are used to support the following LED signals: Power, Ready, Showtime, TXD, and RXD.

EEPROM Interface

A 2-wire serial EEPROM is used to store USB device, configuration, interface, and endpoint descriptors. Device descriptors
include Vendor ID, Product ID, Device Release Number, Manufacturer Name, Product Name, and Serial Number. Both 4196
bit and 2048 bit EEPROMs are supported. The EEPROM speed must be capable of 400 kHz clock frequency.
A typical 4196 bit (512 x 8) EEPROM that meets P5200 UIC requirements is the Fairchild M24C04M8 or equivalent.
A typical 2048 bit (256 x 8) EEPROM that meets P5200 UIC requirements is the Fairchild M24C02M8 or equivalent.

General Purpose Input/Output Interface

Most General Purpose Input/Output (GPIO) pins are programmed for dedicated system functions or reserved for test or
growth functions and are not available for user assignment. Each GPIO pin is controlled individually for input/output direction.
All GPIO pins can serve as external interrupt inputs.

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2.3.2

CX11627 ADDP Description

The CX11627 ADSL DMT Data Pump (ADDP) is a T1.413 Issue 2, G.992.1, and G.992.2 compliant custom digital signal
processing (DSP) chip built specifically for DMT ADSL transmission for use in ADSL modems. The CX11627 operates from
+2.5V for core operation and +3.3V for interface circuit operation. A block diagram of the CX11627 ADDP is shown in Figure
2-2.

ATM Transmission Convergence

In the transmit direction, the ATM Transmission Convergence (TC) block embeds ATM cells into the serial data stream being
fed into the digital interface, i.e., the P5200 UIC. In the receive direction, this block extracts the ATM cell boundaries from the
serial data stream coming from the digital interface To reduce traffic on the USB, the TC block performs idle cell insertion in
the transmit direction and idle cell deletion and header error correction in the receive direction.

Digital Interface

The Digital Interface (DI) Transmit Block performs the following functions: transmit data multiplexing and buffering, fast and
interleave data stream framing, transmit data synchronization control, eoc/aoc insertion, CRC encoding, scrambling, FEC
encoding, and data interleaving.

The DI Receive Block performs the following functions: data de-interleaving, FEC decoding, descrambling, CRC check,
receive data synchronization and receive clock generation, demultiplexing and buffering of receive data and receive eoc/aoc.

QAM Encoder/Decoder

The QAM Encoder/Decoder performs the following functions: constellation encoding, clock recovery, receive gain
compensation, frequency domain equalization (FEQ), slicing, and constellation decoding. The block also performs other
functions such as frequency domain signal processing, signal power, error power averaging and computations related to
frequency domain training.

FFT

The FFT performs IFFT for modulation of the transmit symbol, and FFT for demodulation of the receive symbol.

Analog Front End Interface

The Analog Front End (AFE) interface performs the following functions: transmit signal filtering, time domain equalization, and
time domain signal power averaging, and echo cancellation (EC).

Microcontroller Interface

The microcontroller interface enables the P5200 UIC to set parameters to control DSP sequencing and to read/write
coefficients or data.

Transmit

Block

Receive

Block

Digital

Interface (DI)

Bit

Parser

and QAM

Encoder

QAM

Decoder

and Bit

Parser

QAM Encoder/Decoder

FEQ

IFFT

FFT

FFT

Transmit

Filter

Time

Domain

Equalizer

ADC

Intf

AFE Interface

DAC

Intf

Microcontroller

Interface

P5200

USB

Interface

Controller

(UIC)

ATM

CX20431

Analog

Front End

(AFE)

100427 F2-2 BD 11627

CX11627 ADSL DMT Data Pump (ADDP)

Figure 2-2. CX11627 ADDP Block Diagram

AccessRunner ADSL-USB Modem Device Set Data Sheet

Conexant

100427B

3-2

USBP
USBN
FCLKIO (GPIO39)

USB_Pwr_Det (GPIO22)

CLKI

BOPT (GPIO14)

PLLBP

HRST#

LED_READY (GPIO07)
LED_SHOWTIME (GPIO18)
LED_TXD (GPIO19)
LED_RXD (GPIO20)

I2C_SCL (GPIO16)
I2C_SDA (GPIO15)

TRST#
TCK
TMS
TDI
TDO

TREQA

VDD
VDD
VDD
VDD

VDDA

VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO

VGG
VGG

VSS
VSS
VSS
VSS
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSO
VSSA

Reserved (GPIO06)
Reserved (GPIO17)
Reserved (GPIO25)
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved

151
152

150

160

176

11
12

31
32
33
34
35

25
66
99

154

16
37
47
57
71
81
91

107
117
127
137
147
158
171

101

26
67

100
155

17
38
48
58
72
82
92

108
118
128
138
148
159
172

157
175

68
13
14
15
18
19
20
24

+3.3V

BCLKIO (GPIO38)

PAIR_SEL (GPIO21)

LD_OH_DET (GPIO05)

LD_PC (GPIO13)

AFE_RST# (GPIO08)

AFE_SCLK

AFE_STB

AFE_CTRLIN

AFE_CTRLOUT

AFE_WAKEUP

RXSOC0

RCLKAS0

RDATAS0

TXSOC0

TCLKLS0

TDATLS0

RST# (GPIO09)

IRQ0 (GPIO10)
IRQ1 (GPIO11)

PD (GPIO12)

SCANMODE (GPIO26)

HAD00
HAD01
HAD02
HAD03
HAD04
HAD05
HAD06
HAD07
HAD08
HAD09
HAD10
HAD11
HAD12
HAD13
HAD14
HAD15

HC01
HC02
HC03
HC04
HC05
HC06
HC07

HAD16
HAD17
HAD18

HC08
HC09

HC12 (GPIO34)

HA10

HAD19
HAD20
HAD21
HAD22
HAD23
HAD24
HAD25
HAD26
HAD27
HAD28
HAD29

HC00 (GPIO32)

FLASH_RST# (GPIO23)

HC11 (GPIO33)

HAD31 (GPIO37)

MB0
MB1

MA00
MA01
MA02
MA03
MA04
MA05
MA06
MA07
MA08
MA09
MA10
MA11
MD00
MD01
MD02
MD03
MD04
MD05
MD06
MD07
MD08
MD09
MD10
MD11
MD12
MD13
MD14
MD15

MM1
MM0

MCLK

MCKE

MRAS#
MCAS#

MWE#

MCS#

30
3
156

166

161
4
7
10
5
6

168
169
167
173
174
170

162
163
164
165
153

88
87
86
85
84
83
80
79
78
77
76
75
74
73
70
65
64
63
62
61
60
59
56
55
54
53
96
95
89

52
51
50
49
46
45
44
43
42
41
40
93
97
90
69

149
146
145
144
143
142
141
140
139
136
135
134
133
132
121
120
119
116
115
114
113
112
111
110
109
106
105
104
103
102
124
125
122
123
126
129
131
130

CX20441 LD

100427_F3-01_HIS P5200 176T

P5200

USB Interface

Controller

(UIC)

176-PIN TQFP

SDRAM

SRAM

USB

INTERFACE

USB PWR DETECT

LED

INTERFACE

CLOCK

RESET CIRCUIT

EEPROM

JTAG

+3.3V OR +5V

+1.8V

+1.8V THROUGH FILTER

GND

CX20431 AFE

CX11627 ADDP
SERIAL
INTERFACE

CX11627 ADDP
PARALLEL
INTERFACE

RECEIVE PAD
I/O PAIR SEL
ROH#

PWRDWN# (OPTIONAL)
PWRDWN#

POR#
STROBE
CTRL_STRB
CTRL_IN
CTRL_OUT
WAKEUP

RXSOC0
R_NCO_AS0
R_DAT_AS0
TXSOC0
T_CLK_LS0
T_DAT_LS0

RSTB
IRQ1
IRQ2
PWR_DWN
SSCANMODE

D00
D01
D02
D03
D04
D05
D06
D07
D08
D09
D10
D11
D12
D13
D14
D15
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
RDB
WRB
CSB

BA0
BA1
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
DQMH
DQML
CLK
CLKE
RAS#
CAS#
WE#
CS#

CX11627 ADDP
CONTROL

4.7K

1 K

A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
OE#
RESET#
NC
NC

LINE
INTERFACE

USB Resume

Figure 3-1. P5200 UIC Hardware Interface Signals

AccessRunner ADSL-USB Modem Device Set Data Sheet

100427B

Conexant

3-3

100427F3-02 PO-P50-176T

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

132
131
130
129
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
102
101
100

99
98
97
96
95
94
93
92
91
90
89

176

175

174

173

172

171

170

169

168

167

166

165

164

163

162

161

160

159

158

157

156

155

154

153

152

151

150

149

148

147

146

145

144

143

142

141

140

139

138

137

136

135

134

133

LED_SHOWTIME (GPIO18)

LED_RXD (GPIO20)

PAIR_SEL (GPIO21)

AFE_SCLK

AFE_CTRLOUT

AFE_WAKEUP

AFE_STB

VDDO

VSSO

AFE_CTRLIN

I2C_SCL (GPIO16)

I2C_SDA (GPIO15)

Reserved
Reserved
Reserved

VDDO

VSSO

Reserved
Reserved
Reserved

VDDA

VSSA

VGG

Reserved

VDD

VSS

CLKI

PLLBP

FCLKIO (GPIO39)
BCLKIO (GPIO38)

TRST#

TCK

TMS

TDI

TDO

TREQA

VDDO

VSSO

BOPT (GPIO14)

HAD29
HAD28
HAD27
HAD26
HAD25

MA11
MWE#
MCS#
MCAS#
VSSO
VDDO
MRAS#
MM0
MM1
MCKE
MCLK
MD00
MD01
MD02
VSSO
VDDO
MD03
MD04
MD05
MD06
MD07
MD08
MD09
MD10
VSSO
VDDO
MD11
MD12
MD13
MD14
MD15
VGG
VSS
VDD
HRST#
FLASH_RST# (GPIO23)

HC08
HC09
HC10
HC00 (GPIO32)
VSSO
VDDO
HC11 (GPIO33)
HC12 (GPIO34)

LED_TXD (GPIO19)

Reserved (GPIO17)

TCLKLS0

TXSOC0

VSSO

VDDO

TDATLS0

RCLKAS0

RXSOC0

RDATAS0

LD_PC (GPIO13)

PD (GPIO12)

IRQ1 (GPIO11)

IRQ0 (GPIO10)

RST# (GPIO09)

AFE_RST# (GPIO08)

LED_READY (GPIO07)

VSSO

VDDO

Reserved (GPIO06)

LD_OH_DET (GPIO05)

VSS

VDD

SCANMODE (GPIO26)

USBN

USBP

USB_Pwr_Det (GPIO22)

MB0

VSSO

VDDO

MB1

MA00

MA01

MA02

MA03

MA04

MA05

MA06

VSSO

VDDO

MA07

MA08

MA09

MA10

HAD24

HAD23

VDDO

VSSO

HAD22

HAD21

HAD20

HAD19

HAD18

HAD17

HAD16

HC07

VDDO

VSSO

HC06

HC05

HC04

HC03

HC02

HC01

HAD15

VDD

VSS

Reserved (GPIO25)

HAD31 (GPIO37)

HAD14

VDDO

VSSO

HAD13

HAD12

HAD11

HAD10

HAD09

HAD08

HAD07

HAD06

VDDO

VSSO

HAD05

HAD04

HAD03

HAD02

HAD01

HAD00

P5200

Figure 3-2. P5200 UIC Pin Signals-176-Pin TQFP

AccessRunner ADSL-USB Modem Device Set Data Sheet

Conexant

100427B

3-4

Table 3-1. P5200 UIC Hardware Signal Definitions

Label

Pin

I/O

I/O Type

Signal Name/Description

USB INTERFACE

USBP,
USBN

151,
152

I/O

Iu/Ou

USB Port. USBP and USBN are the differential data positive and
negative signals of the USB port. Connect USBP and USBN to USB
+Data and -Data, respectively, through 10

, and optionally through a

quick switch in order to isolate the USBP and USBN from the USB
during suspend mode.

FCLKIO (GPIO39)

USB Resume. Active high input used to detect occurrence of USB
resume event.

USB POWER DETECT INTERFACE

USB5V_DET
(GPIO22)

150

USB 5 V Detect. Active high input used to detect presence of +5 V at
the USB connector.

CLOCK INTERFACE

CLKI

Ith

Clock In. Connect to 35.328 MHz voltage controlled crystal oscillator
(VCXO) output through 51

CONTROL INTERFACE

HRST#

Ith

Reset. Active low input signal to reset the P5200 UIC. Connect to
reset circuit.

BOPT (GPIO14)

Boot Option. To boot from internal ROM, leave open. To boot from
external ROM, pull down with 4.7k

resistor. Leave open.

PLLBP

PLL Ground. Connect to GND through 4.7 k

CX20431 AFE CONTROL AND SERIAL INTERFACE

AFE_SCLK

AFE Clock In. Connect to AFE STROBE through 33

AFE_STB

Otts4

AFE Strobe Out. Connect to AFE CTRL_STRB.

AFE_CTRLIN

Otts4

AFE Control In. Serial digital data sent to the AFE. Connect to AFE
CTRL_IN.

AFE_CTRLOUT

AFE Control Out. Serial digital data received from the AFE. Connect
to AFE CTRL_OUT.

AFE_WAKEUP

Ith

AFE Wakeup. DSL Power Management Wakeup Signal from AFE.
Connect to AFE WAKEUP.

CX11627 ADDP PARALLEL INTERFACE

HAD[18:16]

53-55

Ot4

Address Lines 9-7. Connect to ADDP A[9:7], respectively.

HC[07:01]

56, 59-64

Ot4

Address Lines 6-0. Connect to ADDP A[6:0], respectively.

HAD[15:0]

65, 70, 73-80,
83-88

I/O

It/Ot4

Data Lines 15-00. Connect to ADDP D[15:0], respectively.

HC08

Ot4

Read Enable. Active low read enable. When asserted, data is
transferred from the selected device onto the data bus. Connect to
ADDP RDB.

HC09

Ot4

Write Enable. Active low write enable. When asserted, data is
transferred from the data bus into the selected device. Connect to
ADDP WRB.

HC12 (GPIO34)

ADDP Chip Select. Active low output select ADDP when asserted.
Connect to ADDP CSB.

IRQ0#
(GPIO10)

163

Itpu

ADDP Interrupt Request 1. Active low input asserted to request
interrupt servicing by the ADDP. Connect to ADDP IRQ1.

IRQ1#
(GPIO11)

164

Itpu

ADDP Interrupt Request 2. Active low input asserted to request
interrupt servicing by the ADDP. Connect to ADDP IRQ2.

PD
(GPIO12)

165

Ot4

ADDP Power Down. Active low output asserted put ADDP in a low
power mode. Connect to ADDP PWR_DWN.

RST#
(GPIO09)

162

Ot4

ADDP Reset. Active low output resets ADDP when asserted. Connect
to ADDP RSTB.

SCANMODE
(GPIO26)

153

Ot4

Scan Mode. Connect to ADDP SSCANMODE.

AccessRunner ADSL-USB Modem Device Set Data Sheet

100427B

Conexant

3-5

Table 3-1. P5200 UIC Hardware Signal Definitions (Continued)

Label

Pin

I/O

I/O Type

Signal Name/Description

CX11627 ADDP SERIAL CHANNEL INTERFACE

RXSOC0

168

Itpu

Receive ATM0 Start of Cell. Connect to ADDP RXSOC0.

RCLKAS0

169

Itpu

Receive AS0/ATM0 Data Clock. Connect to ADDP R_CLK_LS0.

RDATAS0

167

Itpu

Receive AS0/ATM0 Serial Data. Connect to ADDP R_DAT_LS0.

TXSOC0

173

Otts4

Transmit ATM0 Start of Cell. Connect to ADDP TXSOC0.

TCLKLS0

174

Transmit LS0/ATM0 Data Clock. Connect to ADDP T_CLK_LS0.

TDATLS0

170

Otts4

Transmit LS0/ATM0 Serial Data. Connect to ADDP T_DAT_LS0.

CX20431 AFE AND CX20441 LD CONTROL

AFE_RST#
(GPIO08)

161

Ot4

AFE Reset. Active low reset output to the AFE and the LD. Connect
to AFE POR# and to LD PWRDWN#.

LD_PC
(GPIO13)

166

Ot4

Line Driver Power Control. Optionally, connect to LD PWRDWN#
when it is desired to power down only the LD.

LINE INTERFACE

LD_OH_DET
(GPIO05)

156

Off-Hook Detect. Active low; indicates POTS off-hook event. Used
for G.lite Mode only. Connect to off-hook detector circuit.

PAIR_SEL
(GPIO21)

Itpu/Ot4

Inner/Outer Pair Select. Connect to wire-pair selection circuit.

BCLKIO (GPIO38)

Itpu/Ot4

Receive Pad. Connect to receive pad circuitry in hybrid.

SERIAL EEPROM INTERFACE

I2C_SCL (GPIO16)

Ot4

Serial EEROM Clock. Connect to EEPROM clock input.

I2C_SDA (GPIO15)

Itpu

Serial EEROM Data. Connect to EEPROM data line.

JTAG INTERFACE

TRST#

Itpu

JTAG Reset. A high-to-low transition on this signal forces the TAP
controller into a logic reset state. This pin has an internal pullup, and it
conforms to IEEE 1149.1 JTAG specification.

TCK

JTAG Test Clock. This is the boundary scan clock input signal. This
pin has an internal pullup, and it conforms to IEEE 1149.1 JTAG
specification.

TMS

Itpu

JTAG Test Mode Select. This signal controls the operation of the
TAP controller. This pin has an internal pull-up, and it conforms to
IEEE 1149.1 JTAG specification.

TDI

Itpu

JTAG Test Input. This signal contains serial data that is shifted in on
the rising edge of TCK. The pin has an internal pullup, and it conforms
to IEEE 1149.1 JTAG specification.

TDO

Otts4

JTAG Test Output Data. This is the three-stateable boundary scan
data output signal from the MCU, and it is shifted out on the falling
edge of TCK. It conforms to IEEE 1149.1 JTAG specification.

AccessRunner ADSL-USB Modem Device Set Data Sheet

Conexant

100427B

3-6

Table 3-1. P5200 UIC Hardware Signal Definitions (Continued)

Label

Pin

I/O

I/O Type

Signal Name/Description

SDRAM/SRAM INTERFACE

MA[11:00]

132-136, 139-145

Ot4

Multiplexed Row and Column Address Lines. Connect to
SDRAM/SRAM A[11:0], respectively.

MD[15:00]

102-106, 109-
116, 119-121

I/O

It/Ot4

Data Lines. Connect to SDRAM/SRAM D[15:0], respectively.

MB0

149

Ot4

Bank Address Select 0. Connect to SDRAM/SRAM Bank Address
Select 0 input for 8 MB SDRAM; leave open for 2 MB SDRAM.

MB1

146

Ot4

Bank Address Select 1. Connect to SDRAM/SRAM Bank Address
Select 1 input.

MM1

124

Ot4

Input/Output Mask 1. Connect to SDRAM/SRAM I/O Mask High
input.

MM0

125

Ot4

Input/Output Mask 0. Connect to SDRAM/SRAM I/O Mask Low
input.

MCLK

122

Ot4

SDRAM Clock. Connect to SDRAM Clock input.

MCKE

123

Ot4

SDRAM Clock Enable. Active high; enables SDRAM clock. Connect
to SDRAM Clock Enable input.

MRAS#

126

Ot4

SDRAM Row Address Strobe. Active low; starts SDRAM access
with strobe of row address. Connect to SDRAM RAS input.

MCAS#

129

Ot4

SDRAM Column Address Strobe. Active low; strobes column
address and data bytes. Connect to SDRAM CAS input.

MWE#

131

Ot4

SDRAM Memory Write Enable. Active low; indicates write access to
SDRAM. Connect to SDRAM Write Enable input.

MCS#

130

Ot4

SDRAM Memory Chip Select. Active low; enables SDRAM
command decoder. Connect to SDRAM chip select input.

LED INTERFACE

LED_RXD
(GPIO20)

Ot4

Receive Data LED. Illuminated when data is received from the ADSL
line.

LED_TXD
(GPIO19)

176

Ot4

Transmit Data LED. Illuminated when data is transmitted to the
ADSL line.

LED_SHOWTIME
(GPIO18)

Ot4

Showtime LED. Illuminated when the ADSL transceiver is in
Showtime Mode.

LED_READY
(GPIO070)

160

Ot4

Ready LED. Illuminated when the device is successfully enumerated
on the USB.

POWER AND GROUND

VDD

25, 66, 99, 154

PWR

Core Supply Voltage. Connect to +1.8V.

VDDA

PWR

Supply Voltage. Connect to +1.8V through filter.

VDDO

8, 16, 37, 47, 57,
71, 81, 91, 107,
117, 127, 137,
147, 158, 171

PWR

I/O Supply Voltage. Connect to +3.3V.

VGG

23, 101

REF

I/O Clamp Power Supply. Connect to +5V if available, otherwise
connect to +3.3V.

VSS

26, 67, 100, 155

GND

Core Ground. Connect to digital ground.

VSSO

9, 17, 38, 48, 58,
72, 82, 92, 108,
118, 128, 138,
148, 159, 172

GND

I/O Ground. Connect to digital ground.

VSSA

GND

Ground. Connect to digital ground.

AccessRunner ADSL-USB Modem Device Set Data Sheet

100427B

Conexant

3-7

Table 3-1. P5200 UIC Hardware Signal Definitions (Continued)

Label

Pin

I/O

I/O Type

Signal Name/Description

NOT USED

HC10

Not Used. Connect to GND through 1 K

HAD[29:19]

40-46, 49-52

Ot4

Address Lines 20-10. If Flash ROM is installed, connect to Flash
ROM A[20:10], respectively. If Flash ROM is not installed, leave open.

HC00 (GPIO32)

Ot4

Flash ROM Chip Enable. Active low output enables optional Flash
ROM when asserted. If Flash ROM is installed, connect to Flash ROM
CE#. If Flash ROM is not installed, leave open.

FLASH_RST#
(GPIO23)

Ot4

Flash ROM Reset. Active low output resets optional Flash ROM
when asserted. If Flash ROM is installed, connect to Flash ROM
RESET#. If Flash ROM is not installed, leave open.

HC11 (GPIO33)

I/O

It/Ot4

Not Used. Leave open.

HAD31 (GPIO37)

I/O

It/Ot4

Not Used. Leave open.

TREQA

Itpd

Reserved. This pin is connected to internal circuitry. Leave open.

Reserved (GPIO06)

157

I/O

Itpu/Ot4

Reserved. This pin is connected to internal circuitry. Leave open.

Reserved (GPIO17)

175

I/O

Itpu/Ot4

Reserved. This pin is connected to internal circuitry. Leave open.

Reserved (GPIO25)

I/O

Itpu/Ot4

Reserved. This pin is connected to internal circuitry. Leave open.

Reserved

13-15, 18-20, 24

Reserved. These pins are connected to internal circuitry. Leave open.

NOTES:

I/O Types: See Table 3-2.

Table 3-2. P5200 UIC Input/Output Type Descriptions

I/O Type

Description

Digital input, +5V tolerant, CIN = 8 pF

It/Ot4

Digital input, +5V tolerant, CIN = 8 pF/Digital output, 4 mA, ZINT = 80

Ith

Digital input, +5V tolerant, with hysteresis, CIN = 8 pF

Itpd

Digital input, +5V tolerant, 75k

pull-down, CIN = 8 pF

Itpu

Digital input, +5V tolerant, 75k

pull-up, CIN = 8 pF

Itpu/Ot4

Digital input, +5V tolerant, 75k

pull-up, CIN = 8 pF/Digital output, 4 mA, ZINT = 80

Otts4

Digital output, 3-State, 4 mA, ZINT =80

Iu/Ou

Input, USB receiver/Output, USB driver

NOTES:
1. See DC characteristics in Table 3-3.
2. I/O Type corresponds to the device Pad Type. The I/O column in tables refers to signal I/O direction used in the application.

AccessRunner ADSL-USB Modem Device Set Data Sheet

Conexant

100427B

3-8

P5200 UIC Electrical and Environmental Specifications

P5200 UIC DC electrical characteristics are listed Table 3-3.

P5200 UIC operating conditions are specified in Table 3-4.

P5200 UIC absolute maximum ratings are stated in Table 3-5.

P5200 UIC power consumption is listed in Table 3-6.

Table 3-3. P5200 UIC DC Electrical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Units

Test Conditions

(see Note 1)

Input high voltage

VIH

2.0

VGG + 0.5

VDC

Input low voltage

VIL

-0.5

0.8

VDC

Input leakage current

IIL/IIH

-10

µA

VIN = 0 for Min.
VIN = VIN (MAX) for Max.

Input leakage current (with internal
pull-downs) (See Note 2)

IIL/IIH

-10

100

µA

VIN = 0 for Min.
VIN = VIN (MAX) for Max.

Input leakage current (with internal
pull-ups) (See Note 2)

IIL/IIH

-100

µA

VIN = 0 for Min.
VIN = VIN (MAX) for Max.

Internal pullup/pulldown resistance

Rpu/Rpd

200

Output high voltage

VOH

2.4

VDDO

VDC

IOH = 4 mA

Output low voltage

VOL

0.4

VDC

IOL = 4 mA

Input/output capacitance

CINOUT

NOTES:
1. Test Conditions (unless otherwise stated):

VDDcore = +1.8 ± 0.15 VDC
VDDO = +3.3 ± 0.3 VDC;
VIN (MAX) = +3.6V for VGG connected to +3.3V;
VIN (MAX) = +5.25V for VGG connected to +5V.

2. Current flow out of the device is shown as minus.
3. Stresses above those listed may cause permanent device failure. Functionality at or above these limits is not implied. Exposure to

absolute maximum ratings for extended periods of time may affect device reliability.

AccessRunner ADSL-USB Modem Device Set Data Sheet

100427B

Conexant

3-9

Table 3-4. P5200 UIC Operating Conditions

Parameter

Symbol

Min

Typ

Max

Units

Core power supply

VDD

1.65

1.8

1.95

VDC

I/O power supply

VDDO

3.0

3.3

3.6

VDC

Operating ambient temperature

°C

Table 3-5. P5200 UIC Absolute Maximum Ratings

Parameter

Symbol

Min

Max

Units

Core power supply

VDD

-0.35

2.0

VDC

I/O power supply (VDDO = +3.3 V)

VDDO

-0.35

3.7

VDC

I/O power supply (VDDO = +5 V)

VDDO

-0.35

7.0

VDC

Input voltage

VIN

-0.35

VGG + 0.35*

VDC

Voltage applied to outputs in high impedance (Off)
state

VHZ

-0.35

VGG + 0.35*

VDC

Storage temperature

-55

125

°C

* VGG = +3.3 V ± 0.3 V or +5 V ± 0.25 V.

Caution: Handling CMOS Devices

These devices contain circuitry to protect the inputs against damage due to high static voltages. However, it is advised that
normal precautions be taken to avoid application of any voltage higher than maximum rated voltage.

An unterminated input can acquire unpredictable voltages through coupling with stray capacitance and internal cross talk.
Both power dissipation and device noise immunity degrades. Therefore, all inputs should be connected to an appropriate
supply voltage.

Input signals should never exceed the voltage range from 0.5V or more negative than GND to 0.5V or more positive than
VDD. This prevents forward biasing the input protection diodes and possibly entering a latch up mode due to high current
transients.

Table 3-6. P5200 UIC Power Consumption

Mode

Typ. Current

(mA)

Max. Current

(mA)

Typ. Power

(mW)

Max. Power

(mW)

VDD (+1.8 V)

105

155

205

VDDO (+3.3 V)

NOTES:
1. Operating voltage: VDD = +1.8 VDC ± 0.15 VDC

VDDO = +3.3 VDC ± 0.3 VDC.

2. Test conditions:

VDD = +1.8 VDC for typical values; VDD = +1.95 VDC for maximum values.
VDDO = +3.3 VDC for typical values; VDDO = +3.6 VDC for maximum values.

AccessRunner ADSL-USB Modem Device Set Data Sheet

100427B

Conexant

3-11

MCLK
VCXO_CTRL

RXSOC0
R_NCO_AS0
T_CLK_AS1
R_DAT_AS0
TXSOC0
T_CLK_LS0
T_DAT_LS0

RSTB
IRQ1
IRQ2
PWR_DN
SSCANMODE

A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
D00
D01
D02
D03
D04
D05
D06
D07
D08
D09
D10
D11
D12
D13
D14
D15
CSB
RDB
WRB

TLXCK_EN

VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO
VDDO

VDDcore
VDDcore
VDDcore
VDDcore
VDDcore
VDDcore
VDDcore
VDDcore
VDDcore
VDDcore
VDDcore
VDDcore
VDDcore
VDDcore

VGG

VSSO
VSSO
VSSO
VSS
VSS
VSSO
VSSO
VSSO
VSS
VSS
VSS
VSSO
VSS
VSS
VSS
VSSO
VSSO
VSS
VSS
VSS
VSSO
VSSO
VSS
VSSO
VSS
VSS
VSS
VSSO
VSSO
VSS

68
66

45
39
11
41
21
15
16

85
83
82
79
55

102
101
100

99
98
97
96
95
94
91

127
126
125
124
123
120
119
118
117
116
115
114
113
112
111
104

87
86
90

10
27
36
54
69
76
89

110
122
132
156
168
176

25
26
59
60
61
70
71
93

108
109
134
140
154
155

103

1
9

18
19
20
28
35
52
53
62
63
64
72
73
74
75
88
92

105
106
107
121
131
133
139
151
152
153
167
175

RX00
RX08

TX15

AFE_STRB

TEST_START

TEST_DONE

MON_CLK

MON_OUT

MON_DONE

TX00
TX01
TX02
TX03
TX04
TX05
TX06
TX07
TX08
TX09
TX10
TX11
TX12
TX13
TX14

RX01
RX02
RX03
RX04
RX05
RX06
RX07
RX09
RX10
RX11
RX12
RX13
RX14
RX15

DMCK_ALT

T_INTER_BYTEB

T_FAST_BYTEB

T_CLK_AS0

T_DAT_AS1
T_DAT_AS0

T_DAT_LS1
T_DAT_LS1
BIT_CLOCK

TXSOC1

LTR

NTR

NTRCTL

FILTER_CLK

DAC_CLK

R_INTER_SUPERB

R_INTER_DATA

R_FAST_SUPERB
R_FAST_FRAMEB

R_NCO_LS0
R_NCO_LS1

R_NCO_AS1

R_DAT_AS1

R_CLK_LS0
R_CLK_LS1
R_DAT_LS0
R_DAT_LS1

RXSOC1

ADC_CLK

CLIPB

SCANEN

NC
NC
NC
NC
NC

129
143
174
24

58
56

78
77
67

157
158
159
160
161
162
163
164
165
166
169
170
171
172
173
130
135
136
137
138
141
142
144
145
146
147
148
149
150
30
5
4
6
12
7
13
14
17
23
81
8
29
3
2
31
32
33
34
37
38
40
42
47
49
48
50
46
128
84
65
43
44
51
57
80

100427_F3-03_HIS 11627 176T

CX20431 AFE
SERIAL
INTERFACE

CX11627

ADSL DMT Data Pump

(ADDP)

176-PIN TQFP

P5200 UIC

PARALLEL BUS

CLK OUT

CLK CTRL

RXSOC0

RCLKAS0

RDATAS0

TXSOC0

TCLKLS0

TDATLS0

RST# (GPIO09)

IRQ0 (GPIO10)
IRQ1 (GPIO11)

PD (GPIO12

SCANMODE

HC01
HC02
HC03
HC04
HC05
HC06
HC07

HAD16
HAD17
HAD18
HAD00
HAD01
HAD02
HAD03
HAD04
HAD05
HAD06
HAD07
HAD08
HAD09
HAD10
HAD11
HAD12
HAD13
HAD14
HAD15

HC12
HC08
HC09

+3.3V

+2.5V

+5V or +3.3V

P5200 UIC
CONTROL

P5200 UIC

SERIAL

INTERFACE

35. 328 MHZ

CLOCK

TEST
INTERFACE

RX0
RX1
TX0
STROBE

NC
NC

NC
NC
NC

MONITOR
INTERFACE

Figure 3-3. CX11627 ADDP Hardware Interface Signals

AccessRunner ADSL-USB Modem Device Set Data Sheet

Conexant

100427B

3-12

100427 F3-04 PO-11627-176T

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

132
131
130
129
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
102
101
100

99
98
97
96
95
94
93
92
91
90
89

176

175

174

173

172

171

170

169

168

167

166

165

164

163

162

161

160

159

158

157

156

155

154

153

152

151

150

149

148

147

146

145

144

143

142

141

140

139

138

137

136

135

134

133

VSSO

DAC_CLK

FILTER_CLK

T_FAST_BYTEB

T_INTER_BYTEB

T_CLK_AS0
T_DAT_AS0

NTR

VSSO

VDDO

T_CLK_AS1
T_DAT_AS1
T_DAT_LS1
T_DAT_LS1

T_CLK_LS0
T_DAT_LS0

BIT_CLOCK

VSSO

VSS
VSS

TXSOC0

TLXCK_EN

TXSOC1

AFE_STRB

VDDcore
VDDcore

VDDO

VSSO

NTRCTL

DMCK_ALT

R_INTER_SUPERB

R_INTER_DATA

R_FAST_SUPERB

R_FAST_FRAMEB

VSSO

VDDO

R_NCO_LS0
R_NCO_LS1

R_NCO_AS0
R_NCO_AS1

R_DAT_AS0
R_DAT_AS1

NC
NC

VDDO
VSS
RX01
RX00
ADC_CLK
D00
D01
D02
D03
D04
VDDO
VSSO
D05
D06
D07
D08
D09
D10
D11
D12
D13
D14
VDDO
VDDcore
VDDcore
VSSO
VSS
VSS
D15
VGG
A0
A1
A2
A3
A4
A5

A6
A7
A8
VDDcore
VSS
A9
WRB
VDDO

VDDO

VSS

TX15

TX14

TX13

TX12

TX11

TX10

VDDO

VSSO

TX09

TX08

TX07

TX06

TX05

TX04

TX03

TX02

TX01

TX00

VDDO

VDDcore

VSSO

VSS

RX15

RX14

RX13

RX12

RX11

RX10

RX09

RX08

RX07

RX06

VDDcore

VSS

RX05

RX04

RX03

RX02

VDDcore

VSSO

RXSOC0

RXSOC1

R_CLK_LS0

R_DAT_LS0

R_CLK_LS1

R_DAT_LS1

VSSO

VSS

VDDO

SSCAN_MODE

TEST_DONE

TEST_START

VDDcore

VSS

VSSO

SCAN_EN

VCXO_CTRL

MON_DONE

MCLK

VDDO

VDDcore

VSS

VSSO

VDDO

MON_OUT

MON_CLK

PWR_DN

LTR

IRQ2

IRQ1

CLIPB

RSTB

RDB

CSB

VSSO

CX11627

Figure 3-4. CX11627 ADDP Pin Signals - 176-Pin TQFP

AccessRunner ADSL-USB Modem Device Set Data Sheet

100427B

Conexant

3-13

Table 3-7. CX11627 ADDP Hardware Signal Definitions

Signal Name

Pin

I/O

I/O Type

Signal Name/Description

CLOCK INTERFACE

MCLK

Master Clock In. Connect to 35.328 MHz voltage controlled crystal
oscillator (VCXO) output through 51

VXCO_CTRL

VCXO Control Out. Oversampled VCXO analog control voltage
output. Connect to VCXO control circuit.

CX20431 AFE INTERFACE

RX[15:0]

150-144, 142-
141, 138-135,
130-129

Receive Data Lines. In the serial mode of operation, RX8 and RX0
transfer data from the AFE into the ADDP. The negative edge of the
AFE_STR# strobe signal from the AFE clocks the data into the
ADDP.
In the parallel mode of operation, RX[15:0] input data lines transfer
receive data into the ADDP. Data is clocked into the ADDP by
ADC_CLK. This mode is not used; leave RX[15:9] and RX[7:1] open.

TX[15:0]

174-169, 166-157

Transmit Data Lines. In the serial mode of operation, TX15 (used as
a programmable width serial bus) transfers data to the AFE from the
ADDP. The negative edge of the AFE_STR# strobe signal from the
AFE clocks the data from the ADDP.
In the parallel mode of operation, TX[15:0] output data lines transfer
data out of the ADDP. Data is clocked out of the ADDP by DAC_CLK.
This mode is not used; leave TX[14:0] open.

AFE_STR#

AFE Strobe. In the serial mode of operation, AFE_STR# from the
AFE triggers the transfer of serial transmit data on TX15 from the
ADDP to the AFE and triggers the transfer of serial receive data on
RX8 and RX0 from the AFE to the ADDP.

ADC_CLK

128

Receive Clock for Parallel Mode. In the parallel mode of operation,
data on RX[15:0] is clocked in to the ADDP by ADC_CLK. Not used;
leave open.

DAC_CLK

Transmit Clock for Parallel Mode. In the parallel mode of operation,
data on TX[15:0] is clocked out of the ADDP by DAC_CLK. Not used;
leave open.

FILTER_CLK

AFE Filter Clock. This signal can be used by the DAC interface block
to strobe the external AFE filters. Not use; leave open

P5200 UIC PARALLEL INTERFACE

D[15:0]

104, 111-120,
123-127

I/O

It/Ot

Data Bus. A 16-bit input/output data bus used to send data to the UIC
during a read operation or receive data from the UIC during a write
operation. Connect to D[15:0] to UIC HAD[15:0], respectively.

A[9:0]

91, 94-102

Address Bus. A 10-bit input address bus that identifies the location in
the ADDP that data on D[15:0] is written to during a write operation, or
that data is read from during a read operation for placing on D[15:0].
Connect A[9:7] to UIC HC[18:16], respectively and A[6:0] to UIC
HC[07:01], respectively.

CS#

Chip Select. Active low control input selects the ADDP. Connect CS#
to UIC HC12.

RD#

Data Read Enable. Active low control input strobes (on the negative
edge) data from the addressed location in the ADDP onto D[15:0].
Connect RD# to UIC HC08.

WR#

Data Write Enable. Active low control input strobes (on the negative
edge) data on D[15:0] into the ADDP addressed location. Connect
WR# to UIC HC09.

AccessRunner ADSL-USB Modem Device Set Data Sheet

Conexant

100427B

3-14

Table 3-7. CX11627 ADDP Hardware Signal Definitions (Continued)

Signal Name

Pin

I/O

I/O Type

Signal Name/Description

P5200 UIC CONTROL

RSTB

Reset. Active low control input. When asserted, the ADDP is held in a
reset state. Connect to UIC RST# (GPIO09).

IRQ1

Interrupt Request 1. Active high interrupt asserted to request service
by the UIC. Connect to UIC IRQ0 (GPIO10).

IRQ2

Interrupt Request 2. Active high interrupt asserted to request service
by the UIC. Connect to UIC IRQ1 (GPIO11).

PWR_DN

Power Down. Active high control input When asserted, the ADDP is
held in a low power mode. Connect to UIC PD (GPIO12).

SSCANMODE

Scan Mode. Connect to UIC SCANMODE (GPIO26).

TLXCK_EN

LSX Transmit Data Clock Generation Enable. Connect to +3.3V.

P5200 UIC SERIAL INTERFACE

RXSOC0

TC0 Block Receive Start of Cell. Connect to UIC RXSOC0.

R_DAT_AS0

Receive Data (AS0). Connect to UIC RDATAS0.

R_NCO_AS0

Receive NCO (AS0). Connect to UIC RCLKAS0.

T_CLK_AS1

Transmit Data Clock (AS1). Connect to ADDP NCO_AS0.

T_CLK_LS0

I/O

Transmit Data Clock (LS0). Connect to UIC TCLKLS0.

T_DAT_LS0

Transmit Data (LS0). Connect to UIC TDATLS0.

TXSOC0

TC0 Block Transmit Start of Cell. Connect to UIC TXSOC0.

MONITOR INTERFACE

MON_OUT

Monitor Output. 1-bit serial D/A output used for constellation
monitoring. Used for test only; leave open during normal operation.

MON_CLK

Monitor Clock. Serial monitor 138 kHz clock output. Used for test
only; leave open during normal operation.

MON_DONE

Monitor Done. New symbol constellation qualifier. Used for test only;
leave open during normal operation.

POWER AND GROUND

VDDcore

25, 26, 59, 60, 61,
70, 71, 93, 108,
109, 134, 140,
154, 155

PWR

Core Circuits Supply Voltage. Connect to +2.5V supply.

VDDO

10, 27, 36, 54, 69,
76, 89, 110, 122,
132, 156, 168,
176

PWR

Input/Output Circuits Supply Voltage. Connect to +3.3V supply.

VSS

19, 20, 53, 62, 63,
72, 73, 74, 92,
105, 106, 131,
139, 151, 152,
175

GND

Core Circuits Ground. Connect to digital ground.

VSSO

1, 9, 18, 28, 35,
52, 64, 75, 88,
107, 121, 133,
153, 167

GND

Input/Output Circuits Ground. Connect to digital ground.

VGG

103

Input Reference Voltage. Reference voltage for +5V tolerant input
pins. A connection to +5V allows +5V or +3.3V input levels. A
connection to +3.3V allows +3.3V input levels only.

AccessRunner ADSL-USB Modem Device Set Data Sheet

100427B

Conexant

3-15

Table 3-7. CX11627 ADDP Hardware Signal Definitions (Continued)

Signal Name

Pin

I/O

I/O Type

Signal Name/Description

NOT USED

R_INTER_SUPERB

Receive Interleaved Data Bit Output Superframe Qualifier. Not
used; leave open.

R_INTER_DATA

Receive Interleaved Data Bit Output. Clocked at BIT_CLOCK rate.

R_FAST_SUPERB

Receive Fast Data Bit Output Superframe Qualifier. Not used;
leave open.

R_FAST_FRAMEB

Receive Fast Data Bit Output Frame Qualifier. Not used; leave
open.

R_CLK_LS0

Receive Data Clock (LS0). Not used; leave open.

R_CLK_LS1

Receive Data Clock (LS1). Not used; leave open.

R_DAT_AS1

Receive Data (AS1). Not used; leave open.

R_DAT_LS0

Receive Data (LS0). Not used; leave open.

R_DAT_LS1

Receive Data (LS1). Not used; leave open.

R_NCO_AS1

Receive NCO (AS1). Not used; leave open.

R_NCO_LS0

Receive NCO (LS0). Not used; leave open.

R_NCO_LS1

Receive NCO (LS1). Not used; leave open.

CLIPB

Clip Interrupt. This status output goes low for one ADC_CLK clock
cycle whenever clipping is detected. This signal can be for monitoring
incoming data for saturation. Not used; leave open.

T_INTER_BYTEB

Transmit Interleaved Data Bit Input Enable. Not used; leave open.

T_FAST_BYTEB

Transmit Fast Data Bit Input Enable. Not used; leave open.

T_CLK_AS0

Transmit Data Clock (AS1). Not used; leave open.

T_DAT_AS1

Transmit Data (AS1). Not used; leave open.

T_DAT_AS0

Transmit Data (AS0). Not used; leave open.

T_CLK_LS1

I/O

Transmit Data Clock (LS1). Not used; leave open.

T_DAT_LS1

Transmit Data (LS1). Not used; leave open.

TXSOC1

TC1 Block Transmit Start of Cell. Not used; leave open.

LTR

8 kHz Local Timing Reference. Not used; leave open.

NTR

I/O

8 kHz Network Timing Reference. Not used; leave open.

NTR_CTL

Network Timing Reference I/O Control. Not used; leave open.

BIT_CLOCK

Serial Data Bit Clock Output. Used to synchronize the serial input
and output data bit streams, enables, and superframe qualifiers. Not
used; leave open.

NOTES:

I/O Types: See Table 3-8.

AccessRunner ADSL-USB Modem Device Set Data Sheet

100427B

Conexant

3-19

3.3

CX20431 AFE Hardware Interface Signals

3.3.1

CX20431 AFE Hardware Signals, Pin Assignments, and Signal Definitions

CX20431 AFE hardware interface signals are shown in Figure 3-5.

CX20431 AFE pin assignments are shown in Figure 3-6.

CX20431 AFE hardware interface signals are defined in Table 3-13. DC characteristics are listed in Table 3-15.

CLKIN
CTRL_STRB
CTRL_IN
CTRL_OUT
WAKEUP
POR

RX0
RX1
TX0
STROBE

DVDD

AVDD
AVDD

AVSS
AVSS
DVSS
DVSS
DVSS

11
15
16
17
18
13

24
23
22
19

5
9

10
14
25
27

INP_HYBR_RX

INM_HYBR_RX

OUTP_TX

OUTM_TX

VREFP

VREFM

RBIAS

INP_RX

INM_RX

NC
NC
NC
NC

1
2

7
8

3
4
12
20
26
28

100427_F3-05_HIS 20431 32T

HYBRID

CX20431

ANALOG FRONT END

(AFE)

32-PIN TQFP

P5200 UIC

CX11627 ADDP

+3.3V

+3.3V through filter

0.1u

10
uF

0.1u

10
uF

0.1u

10
uF

30K

CX20441 LD

INP_DRV
INM_DRV

AFE_SCLK

AFE_STB

AFE_CTRLIN

AFE_CTRLOUT

AFE_WAKEUP

AFE_RST#

RX00
RX08

TX00

AFE_STRB

Figure 3-5. CX20431 AFE Hardware Interface Signals

100427_F3-06 PO_20431_32T

1
2
3
4
5
6
7
8

24
23
22
21
20
19
18
17

INP_HYBR_RX

INM_HYBR_RX

INP_RX

INM_RX

AVDD

AVSS

OUTP_TX

OUTM_TX

RX0
RX1
TX0
DVDD
NC
STROBE
WAKEUP
CTRL_OUT

AVDD

AVSS

CLKIN

POR

DVSS

CTRL_STRB

CTRL_IN

RBIAS

VREFM

VREFP

DVSS

CX20431

Figure 3-6. CX20431 AFE Pin Signals - 32-Pin TQFP

AccessRunner ADSL-USB Modem Device Set Data Sheet

Conexant

100427B

3-20

Table 3-13. CX20431 AFE Hardware Signal Definitions

Signal Name

Pin

I/O

I/O Type

Signal Name/Description

CLOCK INTERFACE

CLKIN

Clock In. Connect to 35.328 MHz voltage controlled crystal oscillator
(VCXO) output through 51

P5200 UIC CONTROL AND CX11627 ADDP SERIAL INTERFACE

CTRL_STRB

Strobe In. Strobe input for the control interface. Connect to UIC
AFE_STB.

CTRL_IN

Control In. Serial digital data received from the UIC. Connect to UIC
AFE_CTRLIN.

CTRL_OUT

Control Out. Serial digital data sent to the UIC. Connect to UIC
AFE_CTRLOUT.

WAKEUP

Wakeup. Digital output for tone detection mode. Connect to UIC
AFE_WAKEUP.

POR#

Reset. Active low power-On reset. Connect to UIC AFE_RST#.

P5200 UIC CONTROL AND CX11627 ADDP SERIAL INTERFACE

STROBE

Strobe. Strobe output for the data interface. The negative STROBE
edge triggers the transfer of serial transmit data on TX0 from the
ADDP to the AFE and triggers the transfer of serial receive data on
RX0 and RX1 from the AFE to the ADDP. Connect to ADDP
AFE_STRB and to UIC AFE_SCLK.

CX11627 ADDP SERIAL INTERFACE

RX0

Receive Data. Digital receive serial data output on RX0 is transferred
to the ADDP. The negative edge of the STROBE signal from the AFE
clocks the data into the ADDP. Connect to ADDP AFE_RX00.

RX1

Receive Data. Digital receive serial data output on RX1 is transferred
data to the ADDP. The negative edge of the STROBE signal from the
AFE clocks the data into the ADDP. Connect to ADDP AFE_RX08.

TX0

Transmit Data. Digital transmit serial data input on TX0 is transferred
from the ADDP. The negative edge of the STROBE signal clocks the
data from the ADDP. Connect to ADDP AFE_TX00.

HYBRID INTERFACE

INP_HYBR_RX

Receive Input Positive from Hybrid. Receive input positive from the
hybrid circuit. AC couple through 1

µF.

INM_HYBR_RX

Receive Input Negative from Hybrid. Receive input negative from
the hybrid circuit. AC couple through 1

µF.

CX20441 LINE DRIVER INTERFACE

OUTP_TX

Transmit Output Positive. Transmit output positive to the LD.
Connect to LD INP_DRV.

OUTM_TX

Transmit Output Negative. Transmit output negative to the LD.
Connect to LD INM_DRV.

POWER AND GROUND

VREFP

REF

Analog Reference Voltage (+2.5V). Connect to GND through 10

µF

and 0.1

µF in parallel.

REF

Analog Reference Voltage (+1.5V). Connect to GND through 10

µF

and 0.1

µF in parallel.

VREFM

REF

Analog Reference Voltage (+0.5V). Connect to GND through 10

µF

and 0.1

µF in parallel.

RBIAS

REF

Analog Current Reference. Current setting external resistor.
Connect to GND through 30 k

resistor (+1%).

DVDD

PWR

Digital Circuits Supply. Connect to +3.3V.

AVDD

5, 9

PWR

Analog Circuits Supply Voltage. Connect to +3.3V through filter.

DVSS

14, 25, 27

GND

Digital Circuits Ground. Connect to GND.

AVSS

6, 10

AGND

Analog Circuit Ground. Connect to GND.

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3-22

3.3.2

CX20431 AFE Electrical and Environmental Specifications

CX20431 AFE DC electrical characteristics are listed Table 3-15.

CX20431 AFE analog electrical characteristics are listed Table 3-16.

CX20431 AFE operating conditions are specified in Table 3-17.

CX20431 AFE absolute maximum ratings are stated in Table 3-18.

CX20431 AFE power consumption is listed in Table 3-19.

Table 3-15. CX20431 AFE DC Electrical Characteristics

Parameter

Symbol

Min.

Typ.

Max.

Units

Test Conditions

(see Note 1)

Input high voltage

VIH

0.65*VDD

VDD+0.35

VDC

Input low voltage

VIL

-0.35

0.25*VDD

VDC

Input leakage current

IIL

-10

µA

Output high voltage

VOH

0.85*VDD

VDD

VDC

Output low voltage

VOL

0.1*VDD

VDC

Output leakage current

IOLK

µA

NOTES:
1. Test Conditions (unless otherwise stated):

DVDD and AVDD = +5.0 ± 0.25 VDC
VIN (MAX) = +5.25V

2. Current flow out of the device is shown as minus.

Table 3-16. CX20431 AFE Analog Electrical Characteristics

Parameter

Min

Typ

Max

Units

Receive Path

Differential input amplitude of in-band signal

Differential input amplitude of echo

2.1

Input-referred noise density in 170 kHz 1104 kHz, gain = 27 dB

nV/sqrt (Hz)

Input-referred noise density in 170 kHz 1104 kHz, gain = 0 dB

150

nV/sqrt (Hz)

Intermodulation product falling in the downstream band, from an echo tone
with an in band signal, gain = 27 dB

-80

dBFS

Intermodulation product falling in the downstream band, from 2 in band tones,
gain = 0 dB

-80

dBFS

In-band ripple

1.5

Input resistance (single-ended)

Input capacitance (single-ended)

Transmit Path

Differential output amplitude

Output-referred noise density in 25 kHz 132 kHz

250

300

nV/sqrt (Hz)

Output-referred noise density in 170 kHz 1104 kHz

nV/sqrt (Hz)

Intermodulation product from 2 in band tones

-80

dBV

In-band ripple

1.25

Output resistive load (single-ended)

Output capacitive load (single-ended)

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3-26

Table 3-20. CX20441 LD Hardware Signal Definitions

Signal Name

Pin

I/O

I/O Type

Signal Name/Description

P5200 UIC INTERFACE

PWRDWN#

Power Down. Active low power down control input. Connect to UIC
AFE_RST#

CX20431 AFE INTERFACE

INP_DRV

Input Driver Positive. Transmit driver input positive from the AFE.
Connect to AFE OUTP_TX through 1

µF.

INM_DRV

Input Driver Negative. Transmit driver input negative input from the
AFE. Connect to AFE OUTM_TX through 1

µF.

HYBRID INTERFACE

OUTP_DRV

Output Driver Positive. Transmit driver output positive to the hybrid
circuit. Imax = 280 mA.

OUTM_DRV

Output Driver Negative Transmit driver output negative to the hybrid
circuit. Imax = 280 mA.

MISCELLANEOUS

RBIAS

REF

Bias. Current setting external resistor. Connect to GND through
124 k

resistor (+1%).

POWER AND GROUND

AVDD

6, 19

PWR

Analog Power. Connect to +5V through filter.

AVSS

8, 17

GND

Analog Ground. Connect to GND.

NO CONNECT

1, 3, 9-16, 20-22,
24-32

No Connect. These pins are not connected to internal circuitry.

NOTES:

I/O Types: See Table 3-21.

Table 3-21. CX20441 LD Input/Output Type Descriptions

I/O Type

Description

Digital input, +5V tolerant, CIN = 8 pF

Analog input

Analog output

NOTES:
1. See analog electrical characteristics in Table 3-22.
2. I/O Type corresponds to the device Pad Type. The I/O column in tables refers to signal I/O direction used in the application.

AccessRunner ADSL-USB Modem Device Set Data Sheet

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3-27

3.4.2

CX20441 LD Electrical and Environmental Specifications

CX20441 LD analog electrical characteristics are listed Table 3-22.

CX20441 LD operating conditions are specified in Table 3-23.

CX20441 LD absolute maximum ratings are stated in Table 3-24.

CX20441 LD power consumption is listed in Table 3-25.

Table 3-22. CX20441 LD Analog Electrical Characteristics

Parameter

Min

Typ

Max

Units

Differential output amplitude

4.485

Differential input amplitude

2.0

Input signal bandwidth

25..132

kHz

Input referred noise density in 170 kHz 1104 kHz

nV/sqrt (Hz)

Input referred noise density beyond 1104 kHz

270

nV/sqrt (Hz)

Intermodulation product falling in the downstream band from two in-band
tones (100 kHz and 120 kHz)

-75

dBV

Differential gain

7.014

In-band ripple

0.05

Input capacitance (single-ended)

Input resistance (single-ended)

Output capacitance (single-ended)

Output resistive load (single-ended)

18.36

Table 3-23. CX20441 LD Operating Conditions

Parameter

Symbol

Min

Typ

Max

Units

Power supply

AVDD

4.75

5.25

VDC

Operating ambient temperature

°C

Table 3-24. CX20441 LD Absolute Maximum Ratings

Parameter

Symbol

Min

Max

Units

Power supply

AVDD

-0.35

VDC

Digital input voltage

VIN

-0.35

AVDD + 0.35

VDC

Analog input voltage

VIN

-0.35

AVDD + 0.35

VDC

Storage temperature

-65

150

°C

Table 3-25. CX20441 LD Power Consumption

Mode

Typ.

Current

(mA)

Max.

Current

(mA)

Typ.

Power

(mW)

Max.

Power

(mW)

AVDD

126

NOTES:
1. Operating voltage: AVDD = +5.0 VDC ± 0.25 VDC.
2. Test conditions:

AVDD = +5.0 VDC for typical values; AVDD = +5.25 VDC for maximum values; modem in Showtime mode.

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4-2

Table 4-1. Device Descriptors

Offset

Field

Size

Value

Default

(Hex.)

Description

bLength

Number

Size of this descriptor in bytes.

bDescriptorType

Constant

DEVICE Descriptor Type.

bcdUSB

BCD

0110

USB Specification Release Number in Binary-Coded Decimal (i.e.,
2.10 is 0x210). This field identifies the release of the USB
Specification that the device and its descriptors are compliant with.

bDeviceClass

Class

Class code (assigned by USB).
If this field is reset to 0, each interface within a configuration
specifies its own class information and the various interfaces
operate independently.
If this field is set to a value between 1 and 0xFE, the device
supports different class specifications on different interfaces and the
interfaces may not operate independently. This value identifies the
class definition used for the aggregate interfaces. (For example, a
CD-ROM device with audio and digital data interfaces that require
transport control to eject CDs or start them spinning.)
If this field is set to 0xFF, the device class is vendor specific.

bDeviceSubClass

SubClass

Subclass code (assigned by USB).
These codes are qualified by the value of the bDeviceClass field.
If the bDeviceClass field is reset to 0, this field must also be reset to
0.
If the bDeviceClass field is not set to 0xFF, all values are reserved
for assignment by USB.

bDeviceProtocol

Protocol

Protocol code (assigned by USB). These codes are qualified by the
value of the bDeviceClass and the bDeviceSubClass fields. If a
device supports class-specific protocols on a device basis as
opposed to an interface basis, this code identifies the protocols that
the device uses as defined by the specification of the device class.
If this field is reset to 0, the device does not use class specific
protocols on a device basis. However, it may use class specific
protocols on an interface basis.
If this field is set to 0xFF, the device uses a vendor specific protocol
on a device basis.

bMaxPacketSize0

Number

Maximum packet size for endpoint zero (only 8, 16, 32, or 64 are
valid).

idVendor

0572

Vendor ID (assigned by USB).

idProduct

CAFE

Product ID (assigned by the manufacturer).

bcdDevice

BCD

0001

Device release number in binary-coded decimal.

iManufacturer

Index

Index of string descriptor describing manufacturer.

iProduct

Index

Index of string descriptor describing product.

iSerialNumber

Index

Index of string descriptor describing the device's serial number.

bNumConfigurations

Number

Number of possible configurations.

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4-3

4.1.2 Configuration

Descriptor

A configuration descriptor describes information about a specific device configuration (see Table 4-2). The descriptor
describes the number of interfaces provided by the configuration.

Table 4-2. Configuration Descriptors

Offset

Field

Size

Value

Default

(Hex.)

Description

bLength

Number

Size of this descriptor in bytes.

bDescriptorType

Constant

CONFIGURATION.

wTotalLength

Number

0043

Total length of data returned for this configuration. Includes the
combined length of all descriptors (configuration, interface,
endpoint, and class or vendor specific) returned for this
configuration.

bNumInterfaces

Number

Number of interfaces supported by this configuration.

bConfigurationValue

Number

Value to use as an argument to Set Configuration to select this
configuration.

iConfiguration

Index

Index of string descriptor describing this configuration.

bmAttributes

Bitmap

Configuration characteristics

Bus Powered

Self Powered

Remote Wakeup

D4..0 Reserved (reset to 0)

A device configuration that uses power from the bus and a local
source sets both D7 and D6. The actual power source at runtime
may be determined using the Get Status device request.
If a device configuration supports remote wakeup, D5 is set to 1.

MaxPower

Maximum power consumption of USB device from the bus in this
specific configuration when the device is fully operational.
Expressed in 2 mA units (i.e., 50 = 100 mA).
Note: A device configuration reports whether the configuration is
bus-powered or self-powered. Device status reports whether the
device is currently self-powered. If a device is disconnected from
its external power source, it updates device status to indicate that
it is no longer self-powered.
A device may not increase its power draw from the bus, when it
loses its external power source, beyond the amount reported by its
configuration.
If a device can continue to operate when disconnected from its
external power source, it continues to do so. If the device cannot
continue to operate, it fails operations it can no longer support.
Host software may determine the cause of the failure by checking
the status and noting the loss of the device's power source.

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4-4

4.1.3 Interface

Descriptor

An interface descriptor describes a specific interface provided by the associated configuration (see Table 4-3). It is always
returned as part of a configuration descriptor. An interface descriptor never includes endpoint zero in the number of
endpoints.

Table 4-3. Interface Descriptors

Offset

Field

Size

Value

Default

(Hex.)

Description

bLength

Number

Size of this descriptor in bytes.

bDescriptorType

Constant

INTERFACE Descriptor Type.

bInterfaceNumber

Number

Number of interface. Zero-based value identifying the index in the
array of concurrent interfaces supported by this configuration.

bAlternateSetting

Number

Value used to select alternate setting for the interface identified in
the prior field.

bNumEndpoints

Number

Number of endpoints used by this interface (excluding endpoint
zero). If this value is 0, this interface only uses endpoint zero.

bInterfaceClass

Class

Class code (assigned by USB).
If this field is reset to 0, the interface does not belong to any USB
specified device class.
If this field is set to 0xFF, the interface class is vendor specific.
All other values are reserved for assignment by USB.

bInterfaceSubClass

SubClass

Subclass code (assigned by USB). These codes are qualified by the
value of the

bInterfaceClass

field.

If the

bInterfaceClass

field is reset to 0, this field must also be

reset to 0.
If the

bInterfaceClass

field is not set to 0xFF, all values are

reserved for assignment by USB.

bInterfaceProtocol

Protocol

Protocol code (assigned by USB). These codes are qualified by the
value of the

bInterfaceClass

and the

bInterfaceSubClass

fields. If an interface supports class-specific requests, this code
identifies the protocols that the device uses as defined by the
specification of the device class.
If this field is reset to 0, the device does not use a class specific
protocol on this interface.
If this field is set to 0xFF, the device uses a vendor specific protocol
for this interface.

iInterface

Index

Index of string descriptor describing this interface.

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4-5

4.1.4 Endpoint

Descriptor

Each endpoint used for an interface has its own descriptor, which contains the information required by the host to determine
the bandwidth requirements of each endpoint (see Table 4-4). An endpoint descriptor, like an Interface Descriptor, is always
returned as part of a configuration descriptor. The default values are:

Bulk In 1:

07058102400000

Bulk Out 1: 07050102400000
Bulk In 2:

07058202400000

Bulk Out 2: 07050202400000
Bulk In 3:

07058302400000

Bulk Out 3: 07050302400000
Bulk In 4:

07058402400000

Bulk Out 4: 07050402400000

Table 4-4. Endpoint Descriptors

Offset

Field

Size

Value

Description

bLength

Number

Size of this descriptor in bytes.

bDescriptorType

Constant

ENDPOINT Descriptor Type.

bEndpointAddress

Endpoint

The address of the endpoint on the USB device described by this
descriptor. The address is encoded as follows:

Bit 0..3: The endpoint number
Bit 4..6: Reserved, reset to 0
Bit 7:

Direction, ignored for control endpoints
0

OUT endpoint

IN endpoint

bmAttributes

Bit Map

This field describes the endpoint's attributes when it is configured
using the bConfigurationValue.

Bit 0..1: Transfer Type

Control

Isochronous

Bulk

Interrupt

All other bits are reserved

wMaxPacketSize

Number

Maximum packet size this endpoint is capable of sending or receiving
when this configuration is selected.
For isochronous endpoints, this value is used to reserve the bus time
in the schedule, required for the per frame data payloads. The pipe
may, on an ongoing basis, actually use less bandwidth than that
reserved. The device reports, if necessary, the actual bandwidth used
via its normal, non-USB defined mechanisms.
For interrupt, bulk, and control endpoints smaller data payloads may
be sent, but will terminate the transfer and may or may not require
intervention to restart. Refer to Chapter 5 for more information.

bInterval

Number

Interval for polling endpoint for data transfers. Expressed in
milliseconds.
This field is ignored for bulk and control endpoints. For isochronous
endpoints this field must be set to 1. For interrupt endpoints, this field
may range from 1 to 255.

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4-6

4.1.5 Enumeration

The enumeration process consists of the following steps:

1. Get device descriptor. The host requests and reads the device descriptor to determine maximum packet size.

2. Set address. The host sends the function address in a data packet using function endpoint 0. Device firmware interprets

this data.

3. Get device descriptor. The host requests and reads the device descriptor to determine such information as device class,

USB Specification compliance level, maximum packet size for endpoint 0, vendor id, product id. Etc.

4. Get configuration descriptor. The host requests and reads the device configuration descriptor to determine such

information as the number of interfaces and endpoints; endpoint transfer type, packet size, and direction; power source
;maximum power; etc. When the host requests the configuration descriptor, all related interface and endpoint descriptors
are returned.

5. Set configuration. The host assigns a configuration value to the device to establish the current configuration.

4.1.6 Endpoint

Pairs

Data transfers with the host are made to/from endpoint pairs on the USB module. The five function endpoint pairs are listed in
Table 4-5.

Table 4-5. Endpoint Pairs

Endpoint Pair

Max. Packet Size

USB Data Transfer Types

Function Endpoint 0

64 bytes

Control

Function Endpoint 1

64 bytes

Bulk

Function Endpoint 2

64 bytes

Bulk

Function Endpoint 3

64 bytes

Bulk

Function Endpoint 4

64 bytes

Bulk

4.1.7

Language ID Table

See Language ID data in Table 4-6.

Table 4-6. Language ID Table

Offset

Field

Size

Value

Default

(Hex.)

Description

bLength

Number

Size of this descriptor in bytes.

bDescriptorType

Constant

INTERFACE Descriptor Type.

Number

0409

4.1.8

Manufacturer String Table

See Manufacturer String data in Table 4-7.

Table 4-7. Manufacturer String Table

Offset

Field

Size

Value

Default

(Hex.)

Description

bLength

Number

Size of this descriptor in bytes.

bDescriptorType

Constant

INTERFACE Descriptor Type.

'-'

Manufacturer string, in unicode

Further Information
literature@conexant.com
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(949) 483-6996 (International)
Printed in USA

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Fax 1:

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(949) 483-4391

Americas

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Phone: (408) 249-9696
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Fax:

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Phone: (949) 483-9119
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Phone: (978) 367-3200
Fax:

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Phone: (215) 244-6784
Fax:

(215) 244-9292

Canada Ontario
Phone: (613) 271-2358
Fax:

(613) 271-2359

Europe

Europe Central Germany
Phone: +49 89 829-1320
Fax:

+49 89 834-2734

Europe North England
Phone: +44 1344 486444
Fax:

+44 1344 486555

Europe Israel/Greece
Phone: +972 9 9524000
Fax:

+972 9 9573732

Europe South France
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Europe Mediterranean Italy
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Fax:

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Phone: +46 (0) 8 5091 4319
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Europe Finland
Phone: +358 (0) 9 85 666 435
Fax:

+358 (0) 9 85 666 220

Asia Pacific

Taiwan
Phone: (886-2) 2-720-0282
Fax:

(886-2) 2-757-6760

Australia
Phone: (61-2) 9869 4088
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(61-2) 9869 4077

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Phone: 86-21-6361-2515
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Fax:

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Phone: (91-11) 692-4789
Fax:

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Phone: (82-2) 565-2880
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Phone: (65) 737 7355
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(65) 737 9077

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