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Электронный компонент: FM336

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Data Sheet
Conexant
Doc. No. 101361A
Proprietary Information
December 1, 2000
FM336Plus
V.34/Group 3 High Performance Fax Modem Family
The ConexantTM FM336Plus High Performance Fax Modem family offers
ITU-T V.34 half-duplex mode operation that supports synchronous Group 3
facsimile send and receive speeds up to 33600 bits per second (bps).
The FM336Plus-D and FM336Plus-D90 support ITU-T V.34 duplex data
and synchronous/asynchronous modes with rates up to 33600 bps. The
FM336Plus-D90 also supports ITU-T V.90 PCM mode, which can receive
data at speeds up to 56 kbps.
The device has low voltage operation and is housed in a 100-pin Plastic Quad
Flat Package (PQFP). The modem's small size and low power consumption
allow the design of compact system enclosures for use in industrial, office, and
home environments. Table 1 lists the FM336Plus Modem Family models and
features.
Utilizing V.34 and V.90 techniques to optimize modem configuration for line
conditions, the modem connects at the optimal selected data rate that the
channel can support from 2400 bps up to 56000 bps. The modem can operate
over the Public Switched Telephone Network (PSTN) through a line terminator
provided by a Data Access Arrangement (DAA).
The FM336Plus is backward pin compatible with the previous Conexant FM336
fax modem, and supports all features of the FM336 family. The FM336Plus also
has numerous feature and performance enhancements. For more information
on the enhancements, refer to the FM336Plus High Performance Fax Modem
Designer's Guide
(document 101360).
Table 1. FM336Plus Modem Family Models and Features
Clock Input
Modem Model
Part
Number
V.34
Fax
Data
Mode
(D)
V.90 PCM
Mode
(-D90)
Oscillator
Clock
Crystal
Clock
FM336Plus
CX06832-11
Yes
No
No
Yes
No
FM336Plus
CX06832-12
Yes
No
No
No
Yes
FM336Plus-D
CX06832-13
Yes
Yes
No
Yes
No
FM336Plus-D
CX06832-14
Yes
Yes
No
No
Yes
FM336Plus-D90
CX06832-15
Yes
Yes
Yes
Yes
No
FM336Plus-D90
CX06832-16
Yes
Yes
Yes
No
Yes
Features
(Entire FM336Plus Family)
2-wire half-duplex fax modem modes
with send and receive data rates up to
33600 bps
-
V.34 half-duplex, V.17, V.33, V.29,
V.27 ter, and V.21 channel 2
-
Short train option in V.17 and
V.27 ter
2-wire duplex data modem modes
-
V.21, V.23 (75 bps TX/1200 bps RX
or 1200 bps TX/75 bps RX)
PSTN session starting
-
V.8 and V.8bis signaling
HDLC support at all speeds
-
Flag generation, 0-bit stuffing, ITU
CRC-16 or CRC-32 calculation and
generation
-
Flag detection, 0 bit deletion, ITU
CRC-16 or CRC-32 check sum
error detection
-
FSK flag pattern detection during
high-speed receiving
Tone modes and features
-
Programmable single or dual tone
generation
-
DTMF receiver
-
Tone detection with three
programmable tone detectors
Serial synchronous data
Parallel synchronous data
Automatic Rate Adaptation (ARA) in
V.34 half-duplex
Auto-dial and auto-answer control
TTL and CMOS compatible DTE
interface
-
ITU-T V.24 (EIA/TIA-232-E)
(data/control)
-
Microprocessor bus
(data/configuration/control)
Receive dynamic range:
-
0 dBm to 43 dBm for V.17, V.33,
V.29, V.27 ter and V.21
-
9 dBm to 43 dBm for V.34 half-
duplex
Quick Start for V.34 half-duplex
(Conexant Proprietary)
Caller ID Demodulation
Call Waiting Detector
ADPCM Voice Mode
FM336Plus
V.34/Group 3 High Performance Fax Modem Family
2
Conexant
101361A
Features
(Entire FM336Plus Family
-
-
-
-
Continued)
Programmable RLSD turn-on and turn-off thresholds
Programmable transmit level: 0 to 15 dBm
Adjustable speaker output to monitor received signal
DMA support for interrupt lines
Two 16-byte FIFO data buffers for burst data transfer with extension
up to 255 bytes
Diagnostic
capability
V.21 Channel 1 Flag detect
V.21 Channel 2 Flag detect
+3.3 V operation with +5 V tolerant inputs
+5 V analog signal interface
100-pin PQFP package
Typical power consumption
-
Sleep mode: 20 mW
-
Normal mode: 250 mW
Distinguishing Features (-D / -D90)
2-wire duplex data modem modes with send and receive rates up to
33600 bps
-
V.34 (33.6 kbps), V.32 bis, V.32, V.22 bis, and V.22
-
Bell 212A and 103
Serial asynchronous data
Parallel asynchronous data
In-band secondary channel (V.34 and V.32 bis)
Automatic Rate Adaptation (ARA) in V.34 duplex and V.32 bis
Automatic Mode Selection (AMS)
Digital near-end and far-end echo cancellation
Bulk delay for satellite transmission
Receive dynamic range:
-
9 dBm to 43 dBm for V.34, V.32 bis, V.32, V.22 bis, V.22, and V.23
511 pattern generation/detection
V.13
signaling
Diagnostic
capability
-
V.54 inter-DCE signaling
-
V.54 local analog and remote digital loopback
Distinguishing Features
(-D90 only)
2-wire duplex data modem modes
with receive data rates up to 56 kbps
and send data rates as specified in
the V.34 specification
-
V.90 PCM mode
Copyright 2000, Conexant Systems, Inc., All Rights Reserved.
Information in this document is provided in connection with Conexant Systems, Inc. ("Conexant") products. These materials are provided by
Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no responsibility for errors or
omissions in these materials. Conexant may make changes to specifications and product descriptions at any time, without notice. Conexant
makes no commitment to update the information contained herein. Conexant shall have no responsibility whatsoever for conflicts or
incompatibilities arising from future changes to its specifications and product descriptions.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in
Conexant's Terms and Conditions of Sale for such products, Conexant assumes no liability whatsoever.
THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO
SALE AND/OR USE OF CONEXANT PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A
PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL
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The following are trademarks of Conexant Systems, Inc.: Conexant, the Conexant C symbol, and "What's Next in Communications
Technologies." Product names or services listed in this publication are for identification purposes only, and may be trademarks of third
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Reader Response: Conexant strives to produce quality documentation and welcomes your feedback. Please send
comments and suggestions to conexant.tech.pubs@conexant.com. For technical questions, contact your local Conexant
sales office or field applications engineer.
V.34/Group 3 High Performance Fax Modem Family
FM336Plus
101361A
Conexant
3
GROUP3 FACSIMILE MODEM
(ENTIRE FM336PLUS FAMILY)
The modem satisfies the requirements specified in
ITU-T recommendations V.34 half-duplex, V.17, V.33,
V.29, V.27 ter, V.21, and meets the binary signaling
requirements of V.8 and T.30 with Annex F.
Internal HDLC support eliminates the need for an
external serial input/output (SIO) device in the DTE for
products incorporating error detection and T.30
protocol. The modem can perform HDLC framing per
T.30 at all data speeds. CRC generation/checking
along with zero insertion/deletion enhances
SDLC/HDLC frame operations. Two FSK (V.21 Ch. 1
and V.21 Ch. 2) flag pattern detectors facilitate FSK
detection during high-speed reception. The modem
features a programmable DTMF transmitter/receiver
and three programmable tone detectors.
DUPLEX DATA MODE (-D / -D90)
The duplex data mode supports Internet facsimile
applications. The modem can connect at the highest
data rate up to 33600 bps with auto fall back to
V.32 bis. The FM336Plus-D and FM336Plus-D90
modems satisfy the requirements specified in ITU-T
recommendations V.34, V.32 bis, V.32, V.22 bis, V.22,
V.23, V.21, Bell 212A, and Bell 103.
ITU-T V.90 PCM MODE (-D90)
The ITU-T V.90 PCM mode can receive data at
speeds up to 56 kbps from a digitally connected V.90
central site modem. The FM336Plus-D90 takes
advantage of the PSTN which is primarily digital to the
central office local loop (except for the client modem)
and is ideal for applications such as remote access to
an Internet Service Provider (ISP), online service, or
corporate intranet. The modem can send upstream
data at speeds up to the V.34 rate.
TECHNICAL SPECIFICATIONS
The FM336Plus modem provides the processing core
for a complete facsimile modem design.
Configurations and Rates
The selectable modem configurations, signaling rates,
and data rates are listed in Table 2.
Automatic Mode Selection (-D / -D90)
When Automatic Mode Selection (AMS) is enabled,
the modem configures itself to the highest compatible
data rate supported by the remote modem. Automode
operation is supported in V.90 (-D90 only), V.34,
V.32 bis, V.32, V.22 bis, V.22, V.21, V.23, Bell 212A,
and Bell 103 modes.
Automatic Rate Adaptation
In V.34 duplex, V.34 half-duplex, and V.32 bis modes,
Automatic Rate Adaptation (ARA) can be enabled to
select the optimal highest acceptable data rate based
on the Eye Quality Monitor (EQM). This selection
occurs during startup.
Two ARA modes are available. ARA in ROM is an
adaptive selection made by the modem based upon a
fixed ROM table. ARA in RAM is based on the host
programmable RAM table and can be changed by the
user.
Data Encoding
The data encoding conforms to ITU-T recommendations
V.90 (-D90 only), V.34, V.32 bis, V.32, V.17, V.33,
V.29, V.27 ter, V.22 bis, V.22, V.23, or V.21, and is
compatible with Bell 208, 212A, or 103, depending on
the configuration.
Tone Generation
The modem can generate single or dual voice-band
tones from 0 Hz to 3600 Hz with a resolution of
0.15 Hz and an accuracy of 0.01%. Tones over
3000 Hz are attenuated. DTMF tone generation allows
the modem to operate as a programmable DTMF
dialer.
FM336Plus
V.34/Group 3 High Performance Fax Modem Family
4
Conexant
101361A
Supervisory Tone Detection
Three parallel tone detectors (A, B, and C) are
provided for supervisory tone detection. The signal
path to these detectors is separate from the main
received signal path.
Each tone detector consists of two cascaded second
order IIR biquad filters. The coefficients are host
programmable. Each fourth order filter is followed by a
level detector which has host programmable turn-on
and turn-off thresholds allowing hysteresis. A pre-filter
and squarer precede tone detector C. This circuit is
useful for detecting a tone with a frequency equal to
the difference between two tones that may be
simultaneously present on the line. The SQDIS bit may
disable the squarer causing tone detector C to be an
eight-order filter. The tone detectors are disabled in
data mode.
The tone detection sample rate is 9600 Hz in V.8 and
V.34 modes and is 7200 Hz in non-V.34 modes. The
default call progress filter coefficients are based on a
7200 Hz sampling rate and apply to non-V.34 modes
only. The maximum detection bandwidth is equal to
one-half the sample rate.
Auto-Dialing and Auto-Answering Control
Features are provided to allow the host to perform
auto-dialing and auto-answering. These functions
include DTMF or pulse dialing, ring detection, and a
comprehensive supervisory tone detection scheme.
The major control parameters are host programmable.
Transmitted Data Spectrum
The transmitter spectrum is shaped by raised cosine
filter functions, either the square root of 12.5% (V.34,
V.32 bis, V.32), 20% (V.17, V.33, and V.29), 50%
(V.27 ter, Bell 208), or 75% (V.22 bis, Bell 212A).
Transmit Level
The transmitter output level is selectable from 0 dBm
to 15 dBm in 1 dB steps and is accurate to 0.5 dB
when used with an external hybrid. The output level
can also be tuned by changing a gain constant in the
modem DSP RAM. The maximum V.34 transmit level
for acceptable receive performance should not exceed
9 dBm.
Answer Tone (-D / -D90)
When the NV25 bit is a zero, the modem generates
a 2100 Hz answer tone at the beginning of the answer
handshake for 5.0 seconds (V.8) or 3.6 seconds
(V.32 bis, V.32, V.22 bis, V.22, V.23, and V.21). The
answer tone has 180 phase reversals every 0.45
seconds to disable network echo cancellers (V.8,
V.32 bis, and V.32).
Receive Level
The modem satisfies performance requirements for
received line signal levels from 0 dBm to 43 dBm
measured at the receiver analog (TIP and RING) input
in V.17, V.33, V.29, V.27 ter, and DTMF modes. In
V.90, V.34, V.32 bis, V.32, V.22 bis, V.22, and
V.23 modes, the receive level range is from 9 dBm
(15 dBm at RIN) to 43 dB. (RIN is 6 dB lower than
TIP and RING.)
Carrier Recovery
The carrier recovery circuit can track a 7 Hz
frequency offset in the received carrier.
Echo Canceller (-D / -D90)
A data echo canceller with near-end and far-end echo
cancellation is included for 2-wire duplex V.90/V.34/
V.32 bis/V.32 operation. The combined echo span of
near and far cancellers can be up to 40 ms. The
proportion allotted to each end is automatically
determined by the modem. The delay between near-
end and far-end echoes can be up to 1.2 seconds.
V.34/Group 3 High Performance Fax Modem Family
FM336Plus
101361A
Conexant
5
Table 2. Configurations, Signaling Rates, and Data Rates
Configuration
Modulation
Carrier
Frequency (Hz)
0.01%
Data Rate (bps)
0.01%
Symbol Rate
(Symbols/Sec)
Bits/Symbol
Data
Bits/Symbol
TCM
Constellation
Points
V.90 PCM
PCM
--
56000 R/V.34 rates T
(Note 4)
8000
Dynamic
--
--
V.34 33600 TCM**
TCM
Note 2
33600
3429 only
Note 2
Note 2
Note 2
V.34 31200 TCM**
TCM
Note 2
31200
3200 min
Note 2
Note 2
Note 2
V.34 28800 TCM**
TCM
Note 2
28800
3000 min
Note 2
Note 2
Note 2
V.34 26400 TCM**
TCM
Note 2
26400
2800 min
Note 2
Note 2
Note 2
V.34 24000 TCM**
TCM
Note 2
24000
2800 min
Note 2
Note 2
Note 2
V.34 21600 TCM**
TCM
Note 2
21600
2400 min
Note 2
Note 2
Note 2
V.34 19200 TCM**
TCM
Note 2
19200
Note 2
Note 2
Note 2
Note 2
V.34 16800 TCM**
TCM
Note 2
16800
Note 2
Note 2
Note 2
Note 2
V.34 14400 TCM**
TCM
Note 2
14400
Note 2
Note 2
Note 2
Note 2
V.34 12000 TCM**
TCM
Note 2
12000
Note 2
Note 2
Note 2
Note 2
V.34 9600 TCM**
TCM
Note 2
9600
Note 2
Note 2
Note 2
Note 2
V.34 7200 TCM**
TCM
Note 2
7200
Note 2
Note 2
Note 2
Note 2
V.34 4800 TCM**
TCM
Note 2
4800
Note 2
Note 2
Note 2
Note 2
V.34 2400 TCM**
TCM
Note 2
2400
2400 only
Note 2
Note 2
Note 2
V.32 bis 14400 TCM
TCM
1800
14400
2400
6
1
128
V.32 bis 12000 TCM
TCM
1800
12000
2400
5
1
64
V.32 bis 9600 TCM
TCM
1800
9600
2400
4
1
32
V.32 bis 7200 TCM
TCM
1800
7200
2400
3
1
16
V.32 bis 4800
QAM
1800
4800
2400
2
0
4
V.32 9600 TCM
TCM
1800
9600
2400
4
1
32
V.32 9600
QAM
1800
9600
2400
4
0
16
V.32 4800
QAM
1800
4800
2400
2
0
4
V.22bis 2400
QAM
1200/2400
2400
600
4
0
16
V.22bis 1200
DPSK
1200/2400
1200
600
2
0
4
V.22 1200
DPSK
1200/2400
1200
600
2
0
4
V.22 600
DPSK
1200/2400
600
600
1
0
4
V.23 1200/75
FSK
1700/420
1200/75
1200
1
0
--
V.21
FSK
1080/1750
Up to 300
300
1
0
--
Bell 208 4800
DPSK
1800
4800
1600
3
0
8
Bell 212A
DPSK
1200/2400
1200
600
2
0
4
Bell 103
FSK
1170/2125
Up to 300
300
1
0
--
V.17 14400 TCM/V.33
TCM
1800
14400
2400
6
1
128
V.17 12000 TCM/V.33
TCM
1800
12000
2400
5
1
64
V.17 9600 TCM
TCM
1800
9600
2400
4
1
32
V.17 7200 TCM
TCM
1800
7200
2400
3
1
16
V.29 9600
QAM
1700
9600
2400
4
0
16
V.29 7200
QAM
1700
7200
2400
3
0
8
V.29 4800
QAM
1700
4800
2400
2
0
4
V.27 ter 4800
DPSK
1800
4800
1600
3
0
8
V.27 ter 2400
DPSK
1800
2400
1200
2
0
4
V.21 Channel 2
FSK
1750
300
300
1
0
--
Notes:
1. Modulation legend:
TCM:
Trellis-Coded Modulation
QAM:
Quadrature Amplitude Modulation
PCM:
Pulse Coded Modulation
FSK:
Frequency Shift Keying
DPSK:
Differential Phase Shift Keying
2. Adaptive; established during handshake:
Symbol Rate (Baud)
V.34 Low Carrier Frequency (Hz)
V.34 High Carrier Frequency (Hz)
2400
1600
1800
2800
1680
1867
3000
1800
2000
3200
1829
1920
3429
1959
1959
3. ** For both duplex and half-duplex modes.
4. Maximum data rate.