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Электронный компонент: DS28-L147-204

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CX81801-7x/8x SmartV.XX Modem Data Sheet
102199B
Conexant
iii
Contents
1.
Introduction..........................................................................................................................................1-1
1.1
Overview ......................................................................................................................................................................... 1-1
1.2
Applications .................................................................................................................................................................... 1-2
1.3
Features .......................................................................................................................................................................... 1-4
1.3.1
General Modem Features................................................................................................................................ 1-4
1.3.2
SmartDAA Features ........................................................................................................................................ 1-5
1.3.3
Applications.................................................................................................................................................... 1-5
1.4
Technical Overview ......................................................................................................................................................... 1-6
1.4.1
General Description ........................................................................................................................................ 1-6
1.4.2
MCU Firmware................................................................................................................................................ 1-6
1.4.3
Operating Modes ............................................................................................................................................ 1-6
1.4.3.1
Data/Fax Modes.......................................................................................................................... 1-6
1.4.3.2
V.44 Data Compression.............................................................................................................. 1-7
1.4.3.3
Worldwide Operation.................................................................................................................. 1-7
1.4.3.4
TAM Mode.................................................................................................................................. 1-8
1.4.3.5
Speakerphone Mode (S Models)................................................................................................ 1-9
1.4.4
Reference Designs.......................................................................................................................................... 1-9
1.5
Hardware Description ..................................................................................................................................................... 1-9
1.5.1
CX81801 Modem Device ................................................................................................................................ 1-9
1.5.2
Digital Isolation Barrier................................................................................................................................. 1-10
1.5.3
CX20493 SmartDAA Line Side Device.......................................................................................................... 1-10
1.5.4
CX20442 Voice Codec .................................................................................................................................. 1-10
1.6
AT Commands .............................................................................................................................................................. 1-10
2.
Technical Specifications .......................................................................................................................2-1
2.1
Serial DTE Interface Operation........................................................................................................................................ 2-1
2.1.1
Automatic Speed/Format Sensing .................................................................................................................. 2-1
2.2
Parallel Host Bus Interface Operation............................................................................................................................. 2-2
2.3
Establishing Data Modem Connections .......................................................................................................................... 2-2
2.3.1
Dialing ............................................................................................................................................................ 2-2
2.3.2
Telephone Number Directory.......................................................................................................................... 2-2
2.3.3
Modem Handshaking Protocol ....................................................................................................................... 2-2
2.3.4
Call Progress Tone Detection ......................................................................................................................... 2-2
2.3.5
Answer Tone Detection................................................................................................................................... 2-2
2.3.6
Ring Detection................................................................................................................................................ 2-2
2.3.7
Billing Protection ............................................................................................................................................ 2-3
2.3.8
Connection Speeds......................................................................................................................................... 2-3
2.3.9
Automode ....................................................................................................................................................... 2-3
2.4
Data Mode ...................................................................................................................................................................... 2-4
CX81801-7x/8x SmartV.XX Modem Data Sheet
iv
Conexant
102199B
2.4.1
Speed Buffering (Normal Mode) .................................................................................................................... 2-4
2.4.2
Flow Control ................................................................................................................................................... 2-4
2.4.3
Escape Sequence Detection............................................................................................................................ 2-4
2.4.4
BREAK Detection ............................................................................................................................................ 2-4
2.4.5
Telephone Line Monitoring............................................................................................................................. 2-4
2.4.6
Fall Forward/Fallback (V.92/V.90/V.34/V.32 bis/V.32) ................................................................................... 2-4
2.4.7
Retrain ............................................................................................................................................................ 2-5
2.4.8
Programmable Inactivity Timer ...................................................................................................................... 2-5
2.4.9
DTE Signal Monitoring (Serial DTE Interface Only) ........................................................................................ 2-5
2.5
V.92 Features.................................................................................................................................................................. 2-5
2.5.1
Modem-on-Hold ............................................................................................................................................. 2-5
2.5.2
Quick Connect ................................................................................................................................................ 2-6
2.5.3
PCM Upstream ............................................................................................................................................... 2-6
2.6
Error Correction and Data Compression......................................................................................................................... 2-6
2.6.1
V.42 Error Correction ..................................................................................................................................... 2-6
2.6.2
MNP 2-4 Error Correction .............................................................................................................................. 2-6
2.6.3
V.44 Data Compression.................................................................................................................................. 2-6
2.6.4
V.42 bis Data Compression ............................................................................................................................ 2-6
2.6.5
MNP 5 Data Compression .............................................................................................................................. 2-7
2.7
Telephony Extensions..................................................................................................................................................... 2-7
2.7.1
Line In Use Detection ..................................................................................................................................... 2-7
2.7.2
Extension Pickup Detection ............................................................................................................................ 2-7
2.7.3
Remote Hangup Detection.............................................................................................................................. 2-8
2.8
Fax Class 1 and Fax Class 1.0 Operation ........................................................................................................................ 2-8
2.9
Point-of-Sales Support ................................................................................................................................................... 2-8
2.10
Voice/Audio Mode .......................................................................................................................................................... 2-8
2.10.1
Online Voice Command Mode ........................................................................................................................ 2-8
2.10.2
Voice Receive Mode ....................................................................................................................................... 2-8
2.10.3
Voice Transmit Mode ..................................................................................................................................... 2-9
2.10.4
Full-Duplex Receive and Transmit Mode ........................................................................................................ 2-9
2.10.5
Audio Mode .................................................................................................................................................... 2-9
2.10.6
Tone Detectors ............................................................................................................................................... 2-9
2.10.7
Speakerphone Mode....................................................................................................................................... 2-9
2.11
V.80 Synchronous Access Mode (SAM) - Video Conferencing ...................................................................................... 2-9
2.12
Full-Duplex Speakerphone (FDSP) Mode (S Models)................................................................................................... 2-10
2.13
Caller ID ........................................................................................................................................................................ 2-10
2.14
Worldwide Country Support ......................................................................................................................................... 2-10
2.15
Diagnostics ................................................................................................................................................................... 2-11
2.15.1
Commanded Tests........................................................................................................................................ 2-11
2.15.2
Power On Reset Tests .................................................................................................................................. 2-11
2.16
Low Power Sleep Mode ................................................................................................................................................ 2-12
3.
Hardware Interface ...............................................................................................................................3-1
3.1
CX81801 Modem Hardware Pins and Signals ................................................................................................................ 3-1
3.1.1
Common to Parallel and Serial Interface Configurations................................................................................ 3-1
3.1.1.1
LSD Interface (Through DIB)...................................................................................................... 3-1
3.1.1.2
Call Progress Speaker Interface ................................................................................................. 3-1
3.1.1.3
Voice Relay Interface (S Models) ............................................................................................... 3-1
3.1.1.4
Serial EEPROM Interface ............................................................................................................ 3-1
3.1.1.5
External Bus Interface ................................................................................................................ 3-2
CX81801-7x/8x SmartV.XX Modem Data Sheet
102199B
Conexant
v
3.1.2
Serial Interface Configuration Only................................................................................................................. 3-2
3.1.2.1
Serial DTE Interface and Indicator Outputs (PARIF = Low)........................................................ 3-2
3.1.3
Parallel Interface Configuration Only (PARIF = High)..................................................................................... 3-3
3.1.3.1
Parallel Host Bus Interface ......................................................................................................... 3-3
3.1.4
CX81801 Modem Interface Signals ................................................................................................................ 3-3
3.2
CX20493 LSD Hardware Pins and Signals ................................................................................................................... 3-22
3.2.1
CX20493 LSD Signal Summary.................................................................................................................... 3-22
3.2.1.1
Smart Modem Interface (Through DIB) ................................................................................... 3-22
3.2.1.2
Telephone Line Interface .......................................................................................................... 3-22
3.2.1.3
Voltage References................................................................................................................... 3-22
3.2.1.4
General Purpose Input/Output.................................................................................................. 3-23
3.2.1.5
No Connects ............................................................................................................................. 3-23
3.2.2
CX20493 LSD Pin Assignments and Signal Definitions ............................................................................... 3-23
3.3
CX20442 VC Hardware Pins and Signals (S Models)................................................................................................... 3-28
3.3.1
CX20442 VC Signal Summary...................................................................................................................... 3-28
3.3.1.1
Speakerphone Interface............................................................................................................ 3-28
3.3.1.2
Telephone Handset/Headset Interface...................................................................................... 3-28
3.3.1.3
CX81801 Modem Interface....................................................................................................... 3-28
3.3.1.4
Host Interface ........................................................................................................................... 3-28
3.3.2
CX20442 VC Pin Assignments and Signal Definitions ................................................................................. 3-29
3.4
Electrical and Environmental Specifications ................................................................................................................. 3-35
3.4.1
Operating Conditions, Absolute Maximum Ratings, and Power Requirements ........................................... 3-35
3.4.2
Interface and Timing Waveforms ................................................................................................................. 3-37
3.4.2.1
External Memory Bus Timing ................................................................................................... 3-37
3.4.2.2
Parallel Host Bus Timing .......................................................................................................... 3-39
3.4.2.3
Serial DTE Interface.................................................................................................................. 3-41
3.5
Crystal Specifications ................................................................................................................................................... 3-42
4.
Package Dimensions ............................................................................................................................4-1
5.
Parallel Host Interface ..........................................................................................................................5-1
5.1
Overview ......................................................................................................................................................................... 5-1
5.2
Register Signal Definitions ............................................................................................................................................. 5-3
5.2.1
IER - Interrupt Enable Register (Addr = 1, DLAB = 0) .................................................................................... 5-3
5.2.2
FCR - FIFO Control Register (Addr = 2, Write Only) ....................................................................................... 5-4
5.2.3
IIR - Interrupt Identifier Register (Addr = 2) .................................................................................................. 5-5
5.2.4
LCR - Line Control Register (Addr = 3) .......................................................................................................... 5-6
5.2.5
MCR - Modem Control Register (Addr = 4).................................................................................................... 5-7
5.2.6
LSR - Line Status Register (Addr = 5)............................................................................................................ 5-7
5.2.7
MSR - Modem Status Register (Addr = 6) ..................................................................................................... 5-9
5.2.8
RBR - RX Buffer (Receiver Buffer Register) (Addr = 0, DLAB = 0) ................................................................ 5-9
5.2.9
THR - TX Buffer (Transmitter Holding Register) (Addr = 0, DLAB = 0).......................................................... 5-9
5.2.10
Divisor Registers (Addr = 0 and 1, DLAB = 1).............................................................................................. 5-10
5.3
Receiver FIFO Interrupt Operation ................................................................................................................................ 5-10
5.3.1
Receiver Data Available Interrupt ................................................................................................................. 5-10
5.3.2
Receiver Character Timeout Interrupts......................................................................................................... 5-11
5.4
Transmitter FIFO Interrupt Operation ........................................................................................................................... 5-11
5.4.1
Transmitter Empty Interrupt......................................................................................................................... 5-11