FM209 [ETC]
9600/14400 BPS MONOFAX MODEM FAMILY; 14400分之9600 BPS MONOFAX现代家族
| 型号： | FM209 |
| 厂家： | 
ETC |
| 描述： | 9600/14400 BPS MONOFAX MODEM FAMILY |
| 文件： | 总12页 (文件大小：115K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FM209 and FM214
9600/14400 bps MONOFAX Modem Family
The Conexant™ FM209 and FM214 MONOFAX modem family offers
synchronous 9600 or 14400 bits per second (bps) half-duplex modems with
error detection, voice and audio codecs, full-duplex speakerphone,
automatic speech recognition, DTMF reception, V.23 full-duplex, Type I
Caller ID and Type II Caller ID CAS detection. It has low power consumption
and is housed in a single 128-pin Thin Quad Flat Pack (TQFP) device
package. The modem's small size and low power consumption allow the
design of compact system enclosures for use in both office and home
environments. Table 1 lists the FM209/FM214 models and features.
Distinguishing Features
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Group 3 Facsimile Modem
The modem can operate over the public switched telephone network (PSTN)
through line termination provided by a data access arrangement (DAA).
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The modem satisfies the requirements specified in ITU-T recommendations
V.33, V.17, V.29, V.27 ter, V.21 Channel 2 (FSK), T.4, and meets the binary
signaling requirements of T.30.
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The modem operates at 14400, 12000, 9600, 7200, 4800, 2400, or 300 bps.
The modem supports the V.17 signaling rates of 14400, 12000, 9600, and
7200 bps using trellis-coded modulation (TCM). In addition, the modem
supports V.27 ter and V.17 short trains.
•
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The modem can also perform HDLC framing according to T.30 at 14400,
12000, 9600, 7200, 4800, 2400, or 300 bps.
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A FSK flag pattern (7E) detector facilitates FSK detection during V.33, V.17,
V.29, and V.27 ter reception.
−
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The modem includes a programmable single/dual tone transmitter, a
programmable DTMF receiver, three programmable tone detectors (which
operate concurrently with the V.21 Channel 2 receiver), and a ring detector.
The transmit output level is also programmable.
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Voice and Audio Codecs (-V Option)
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The voice coder/decoder (codec) compresses voice at an average rate of
2.9 kbps or at a fixed rate of 4.7 kbps with near toll quality playback at
various pitch synchronized playback speeds. An average rate of 2.9 kbps
provides 24 minutes of stored voice messages in 4 Mbits of memory. This
voice codec allows the host controller to efficiently store and playback digital
incoming messages (ICMs) and outgoing messages (OGMs).
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The ADPCM audio codec compresses audio signals (music/voice) at 32
kbps or 24 kbps for highest fidelity coding and reproduction.
The PCM audio codec allows the host controller to transmit and receive
uncompressed audio signals.
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Data Sheet
Order No. MD205
March 31, 1998
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300 mW (-VS option)
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Information provided by Conexant Systems, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by Conexant
for its use, nor any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent rights of Conexant other than for circuitry embodied in Conexant products. Conexant reserves the right to change
circuitry at any time without notice. This document is subject to change without notice.
Conexant and “What’s Next in Communications Technologies” are trademarks of Conexant Systems, Inc.
Product names or services listed in this publication are for identification purposes only, and may be trademarks or registered trademarks of
their respective companies. All other marks mentioned herein are the property of their respective holders.
©1999, Conexant Systems, Inc.
All Rights Reserved.
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MD205
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Selectable error correction coding allows storage in
audio grade RAMs (ARAMs). Echo cancellation
techniques employed during playback allow DTMF,
Type II Caller ID CAS detection, and tone detection
during voice/audio codec operation to support user
selectable features. Dual or single tone transmission is
supported. The coder can record messages from
either the primary or secondary IA.
Conversation recording and message playback are
supported during the speakerphone operation. DTMF
detection, Type II Caller ID CAS detection, and three
tone detectors are also supported.
Automatic Speech Recognition (-R Option)
Automatic Speech Recognition (ASR) consists of
Speaker Independent (SI) North American English
isolated word recognition for a predefined 69 word
vocabulary list, Speaker Dependent (SD) isolated word
training, and SD isolated word recognition functions.
Speakerphone (-S Option)
The full-duplex speakerphone provides hands-free
telephone conversation employing acoustic and line
echo cancellation and supports intercom conversation
employing dual acoustic echo cancellation.
V.23 Full-Duplex Modem and Caller ID
Both full-duplex transmit and receive (with asymmetric
1200/75 bps connection) and half-duplex (1200 bps)
asynchronous V.23 are supported, as well as both
serial and parallel interfaces to the modem. The V.23
algorithm includes an optional, programmable, receive
compromise equalizer which is active in both V.23 and
Caller ID modes.
The optional half-duplex speakerphone provides hand-
free telephone/intercom conversation with exceptional
high gain.
The speakerphone algorithm constantly adjusts its
parameters to deliver the best performance during
real-time conditions, allowing automatic fallback from
full-duplex to pseudo-duplex. The host controller can
easily set up the speaker mute, microphone mute,
automatic gain control (AGC) enable/disable,
microphone level, line level, speaker volume, tone
transmit, and handset functions.
Common applications for V.23 include France's Minitel
and Japan's Lowest Cost Routing.
General Purpose Output (GPO) and General Purpose
Input (GPI) pins are available for host assignment.
Additional design information is described in the
FM209 and FM214 MONOFAX Modem Family
Designer's Guide (Order Number 1175).
Table 1. FM209/FM214 Models and Features
Supported Features
Modem Model
Maximum
Voice and Audio
Full Duplex
Automatic Speech
Line Speed
Codecs (-V)
Speakerphone
Recognition
(-S)
√
(-R)
√
FM214-VSR
FM214-VS
FM214-V
FM214
14.4 kbps
14.4 kbps
14.4 kbps
14.4 kbps
9.6 kbps
9.6 kbps
9.6 kbps
9.6 kbps
√
√
√
--
√
√
√
--
--
√
--
--
√
--
--
FM209-VSR
FM209-VS
FM209-V
FM209
√
--
√
--
--
--
--
MD205
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Receive Dynamic Range
Technical Specifications
The receiver satisfies PSTN performance
Configurations, Symbol Rates and Data Rates
requirements for received line signal levels from 0
dBm to -43 dBm measured at the Receiver Analog
Input (RXA) input. An external input buffer must be
supplied between RXA and LINEIN.
The selectable modem configurations, along with the
corresponding symbol (baud) rates and data rates, are
listed in Table 2.
The default values of the programmable Received
Line Signal Detector (RLSD#) turn-on and turn-off
threshold levels are -43 dBm and -48 dBm,
respectively. The RLSD# threshold levels can be
programmed over the following range:
Scrambler/Descrambler
The modem incorporates a self-synchronizing
scrambler/descrambler in accordance with ITU-T V.33,
V.17, V.29, and V.27 ter recommendations, depending
upon the selected configuration.
Turn on: -10 dBm to -47 dBm
Turn off: -10 dBm to -52 dBm
Data Encoding
Automatic Adaptive Equalizer
The data encoding conforms to ITU-T
recommendations V.33, V.17, V.29, V.27 ter, V.21
Channel 2, and V.23.
An adaptive equalizer in ITU-T V.33, V.17, V.29 and
V.27ter modes compensates for transmission line
amplitude and group delay distortion.
Fixed Digital Cable Compromise Equalizer
Receiver Timing
Compromise equalization can improve performance
when operating over low quality lines. The modem has
a selectable fixed digital compromise cable equalizer
in the high speed receive and transmit data path.
The timing recovery circuit can track a ±0.01%
frequency error in the associated transmit timing
source.
Transmitted Data Spectrum
Carrier Recovery
The transmitted data spectrum is shaped in the
baseband by an excess bandwidth finite impulse
response (FIR) filter with the following characteristics:
The carrier recovery circuit can track a ±7 Hz
frequency offset in the received carrier.
Turn-off Sequence
When operating at 2400 baud, the transmitted
spectrum is shaped by a square root of 20% raised
cosine filter.
Transmitter turn-off sequence times are shown in
Table 4.
When operating at 1600 baud, the transmitted
spectrum is shaped by a square root of 50% raised
cosine filter.
Clamping
Received Data (RXD) is clamped to a constant mark
whenever RLSD# is off.
When operating at 1200 baud, the transmitted
spectrum is shaped by a square root of 90% raised
cosine filter.
V.23 Full-Duplex Features
The out-of-band transmitter energy levels in the 4 - 50
kHz frequency range are below -55.0 dBm.
The modem can transmit and detect Break signals
(continuous Space).
The Mark and Space frequencies are 1300 and 2100
Hz, respectively, for 1200 bps, and 390 and 450 Hz,
respectively, for 75 bps.
Transmit Level
The transmitter output level is programmable in the
DSP RAM from 0 dBm to -15.0 dBm and is accurate to
±1.0 dB. The modem adjusts the output level by
digitally scaling the output to the transmitter's digital-
to-analog converter.
Additional features include an optional host
programmable Receive Compromise Equalizer for
V.23 1200 bps reception and Caller ID mode.
Default transmitter turn-on/turn-off sequence times are
10.5 ms (RTS On to CTS On) and 2.2 ms (RTS Off to
CTS Off).
Turn-on Sequence
Transmitter turn-on sequence times are shown in
Table 3.
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MD205
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Table 2. Configurations, Signaling Rates, and Data Rates
Carrier
Frequency (Hz)
±0.01%
Data Rate (bps)
±0.01%
Baud
(Symbols/Sec.)
Bits
/Symbol
Constellation
Points
Configuration
Modulation1
V.17/V.33 144002
V.17/V.33 120002
V.17 96002
TCM
TCM
TCM
TCM
QAM
QAM
QAM
DPSK
DPSK
FSK
1700 or 1800
1700 or 1800
1700 or 1800
1700 or 1800
1700
14400
12000
9600
7200
9600
7200
4800
4800
2400
300
2400
2400
2400
2400
2400
2400
2400
1600
1200
300
6
5
4
3
4
3
2
3
2
1
1
1
128
64
32
16
16
8
V.17 72002
V.29 9600
V.29 7200
1700
V.29 4800
1700
4
V.27 ter 4800
V.27 ter 2400
V.21 Channel 2 300
V.23 receive HDX
V.23 1200/75
1800
8
1800
4
1650, 1850
1300, 2100
–
FSK
1200
1200/75
1200
1200
–
FSK
1300, 2100/
390, 450
–
Type I Caller ID
FSK
1200, 2200
1200
1200
1
–
Notes:
1. Modulation legend:
QAM:
DPSK:
FSK:
Quadrature Amplitude Modulation
Differential Phase Shift Keying
Frequency Shift Keying
TCM:
Trellis-Coded Modulation
2. FM214 models only.
MD205
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The filter coefficients of each filter are host
programmable in RAM. The output of the tone detector
filter goes to an energy detector.
Table 3. Turn-On Sequence Times
Hardware Interface
The Fax, Digital Telephone Answering Machine
(DTAM), and Speakerphone hardware interface
signals are shown in Figure 1, Figure 2, and Figure 3.
Any point that is active when exhibiting the relatively
more negative voltage of a two-voltage system (0 VDC
for TTL or -12 VDC for EIA/TIA-232-E) is called active
low and is represented by a small circle at the signal
point. Active low signals are indicated by a pound sign
(#), (RESET#).
Edge-triggered clocks are indicated by a small triangle
(DCLK).
≤
≤
Table 4. Turn-Off Sequence Times
A small half circle denotes open-collector (open-
source or open-drain) outputs (signal IRQ#).
A clock intended to activate logic on its rising edge
(low-to-high transition) is called active high, while a
clock intended to activate logic on its falling edge
(high-to-low transition) is called active low. When clock
input is associated with a small circle, the input
activates on a falling edge. If no circle is shown, the
input activates on a rising edge.
The pin assignments for the 128-pin TQFP are shown
in Figure 4.
General Specifications
The modem power and environmental requirements
are listed in Table 5 and Table 6, respectively.
Notes:
1. In parallel data mode, the turn-off sequence may be
extended by 8 bit times.
Table 5. Current and Power Requirements
2. In HDLC mode, the turn-off sequence may be extended by
more than 8 bit times.
Option
Current (Typ.)
Mode
@25°C
3.3V ± 5%.
DVAA
Basic
2.5 ma
50 ma
Caller ID Reception
V
DD
Caller ID reception (CID) allows Customer Premises
Equipment (CPE) to receive a calling party’s directory
number which includes the date and time of the call.
For Type I Caller ID this information is contained in the
first 4-second silent interval in the ring cycle. For Type
II Caller ID support an ACK signal is sent by the CPE
in response to a CAS tone, after which the calling
party information from the Stored Program Control
Switching System (SPCS) can be received by the
CPE.
V
- V
72 ma
80 ma
5.5 ma
DD
V
- VS
DD
5V ± 5% V
GG
Basic
- V
.25 ma
.30 ma
.30 ma
- VS
Note: Input Ripple ≤0.1 Vpeak-peak. The
amplitude of any frequency between 20
kHz and 150 kHz must be less than 500
µVpeak.
Tone Generation
The modem can generate voice-band single or dual
tones from 0 Hz to 4800 Hz with a resolution of 0.15
Hz and an accuracy of 0.01%. Tones over 3000 Hz
are attenuated. Dual tone generation allows the
modem to operate as a programmable DTMF dialer.
Table 6. Environmental Requirements
Parameter
Specification
Temperature
Operating
Tone Detectors
0°C to +70°C (32°F to 158°F)
Storage
-55°C to +125°C (-67°F to 257°F)
All three tone detectors operate in all receive modes.
The tone detectors can also operate as one 12th order
filter.
Relative Humidity
Up to 90% non-condensing, or a wet bulb
temperature up to 35°C, whichever is less.
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MD205
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Software Interface
Modem functions are implemented in firmware
executing in the modem DSP. The DSP RAM interface
memory bits, access functions, codes, and registers
are defined in the Designer’s Guide.
Interface Memory
The DSP communicates with the host processor by
means of a dual-port, interface memory. This interface
memory contains thirty-two 8-bit registers, labeled
register 00h through 1Fh. Each register can be read or
written by the host and the DSP.
The host controls the modem operation by writing
control bits to DSP interface memory and writing
parameter values to DSP RAM through interface
memory. The host monitors the modem operation by
reading status bits from DSP interface memory and
reading parameter values from DSP RAM through
interface memory. An interface memory interrupt is
provided.
DSP RAM Access
The DSP contains 16-bit word RAM. Because the DSP
is optimized for performing complex arithmetic, the
RAM is organized into real (X RAM) and imaginary (Y
RAM) parts. The host processor can read or write both
the X RAM and the Y RAM.
DSP interface memory mediates data exchange
between the host and DSP RAM. The address stored
in interface memory RAM address registers by the
host determines the DSP RAM address for data
access.
MD205
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TXD
RXD
OffHook
Talk
TELEPHONE
LINE
DCLK
RINGD
LINEOUT
LINEIN
DAA
USART
RTS#
(Optional)
CTS#
RLSD#
SPKRP
SPKRM
SPEAKER
DRIVER
(Optional)
READ#
FM209/214
WRITE#
MONOFAX
MODEM
DATA BUS
ADDR. BUS
HOST
CS#
Processor
DECODER
(DTE)
RESET#
IRQ1#
IRQ2#
EYEXY
EYE
XTLI
EYECLK
EYESYNC
PATTERN
GENERATOR
CRYSTAL
XTLO
(Optional)
+5V
+3.3V
GND
POWER
SUPPLY
Figure 1. Modem Functional Interconnect Diagram (Fax)
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MD205
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TXD
RXD
OffHook
Talk
TELEPHONE
LINE
DCLK
RTS#
CTS#
RLSD#
RINGD
DAA
USART
LINEOUT
(Optional)
LINEIN
SPKRP
SPEAKER
DRIVER
SPKRM
READ#
WRITE#
FM209/214-V
MICP
MONOFAX
MODEM
MICM
MICROPHONE
DATA BUS
AMP.
MIC BIAS
ADDR. BUS
HOST
Processor
(DTE)
CS#
DECODER
RESET#
IRQ1#
IRQ2#
EYEXY
EYE PATTERN
GENERATOR
XTLI
EYECLK
CRYSTAL
XTLO
EYESYNC
(Optional)
+5V
+3.3V
GND
POWER
SUPPLY
Figure 2. Modem Functional Interconnect Diagram (Fax and DTAM)
MD205
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OffHook
Talk
TXD
RXD
TELEPHONE
LINE
RINGD
LINEOUT
LINEIN
DCLK
DAA
USART
RTS#
(Optional)
CTS#
RLSD#
SPKRP_P
SPKRM_P
SPEAKER
DRIVER
SPKRP_S
SPKRM_S
READ#
FM209/214-VS
WRITE#
MONOFAX
MODEM
DATA BUS
MICP_P
MICM_P
ADDR. BUS
MICP_S
MICM_S
HOST
Processor
MICROPHONE
AMP.
CS#
DECODER
MIC BIAS_P
(DTE)
MIC BIAS_S
RESET#
IRQ1#
IRQ2#
EYEXY
EYE PATTERN
GENERATOR
(Optional)
EYECLK
EYESYNC
XTLI
CRYSTAL
XTLO
+5V
+3.3V
GND
POWER
SUPPLY
Figure 3. Modem Functional Interconnect Diagram (Fax, DTAM, and Speakerphone)
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MD205
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1
2
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
GPO5
GPO6
VDD4
GPO7
GPI7
GPI6
GPI5
GPI4
GPI3
GPI2
READ#
CS#
SR4IN /RESERVED
1
2
1
2
SR3OUT /RESERVED
EYESYNC
EYECLK
RXD
3
4
5
SR1IO
NC
6
7
EYEXY
SR4OUT
VDD1
RLSD#
DCLK
EN85#
GPI0
RTS#
DGND1
TXD
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
WRITE#
3
2
CSBR# /RESERVED
D0
DGND3
D1
VDD3
DGND2
D2
SA1CLK
RS4
RS3
D3
RS2
D4
RS1
D5
RS0
D6
YCLK
IACLK
IA1CLK
D7
VDD2
1
2
1
2
MCLK_S /NC
CTRLSIN_S /NC
1
2
ICLK_P
NC
RESERVED /NC
1
2
SOUT_S /NC
1
2
AVDD_P
SPKRM_P
SPKRP_P
AGND4
LINEOUT_P
VAA_P
VC_P
SIN-S /NC
1
2
FSYNC_S /NC
1
2
IARESET_S# /NC
AGND1
1
2
LINEIN_S /NC
1
2
MICP_S /NC
1
2
MICM_S /NC
1
2
VREF_P
NC
MICBIAS_S /NC
NC
Notes:
1
2
3
For -S Options
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MD205/DG1175 128TQFP
Figure 4. Pin Signals - 128-Pin TQFP
MD205
11
literature@conexant.com
1-800-854-8099 (North America)
33-14-906-3980 (International)
Phone: (852) 2827 0181
Fax: (852) 2827 6488
Phone: (91 11) 692 4780
Fax: (91 11) 692 4712
www.conexant.com
World Headquarters
Phone: (82 2) 565 2880
Fax: (82 2) 565 1440
Conexant Systems, Inc.
4311 Jamboree Road
P. O. Box C
Europe Headquarters
Newport Beach, CA
92658-8902
Phone: (949) 483-4600
Fax: (949) 483-6375
Conexant Systems France
Les Taissounieres B1
1680 Route des Dolines
BP 283
06905 Sophia Antipolis Cedex
France
Phone: (33 4) 93 00 33 35
Fax: (33 4) 93 00 33 03
Phone: (813) 799-8406
Fax: (813) 799-8306
Phone: (805) 376-0559
Fax: (805) 376-8180
Phone: (49 89) 829 1320
Fax: (49 89) 834 2734
Phone: (215) 244-6784
Fax: (215) 244-9292
Phone: (39 02) 9317 9911
Fax: (39 02) 9317 9913
Phone: (630) 773-3454
Fax: (630) 773-3907
Phone: (44 1344) 486 444
Fax: (44 1344) 486 555
Phone: (978) 692-7660
Fax: (978) 692-8185
Phone: (33 1) 41 44 36 50
Fax: (33 1) 41 44 36 90
Phone: (408) 249-9696
Fax: (408) 249-7113
Middle East
Headquarters
Conexant Systems Commercial
(Israel) Ltd.
P. O. Box 12660
Phone: (972) 773-0723
Fax: (972) 407-0639
Herzlia 46733, Israel
Phone: (972 9) 952 4064
Fax: (972 9) 951 3924
Phone: (770) 246-8283
Fax: (770) 246-0018
Japan Headquarters
Phone: (949) 222-9119
Fax: (949) 222-0620
Conexant Systems Japan Co.,
Ltd.
Shimomoto Building
1-46-3 Hatsudai,
Shibuya-ku, Tokyo
151-0061 Japan
Phone: (81 3) 5371 1567
Fax: (81 3) 5371-1501
APAC Headquarters
Conexant Systems Singapore,
Pte. Ltd.
1 Kim Seng Promenade
Great World City
#09-01 East Tower
Singapore 237994
Phone: (65) 737 7355
Fax: (65) 737 9077
Taiwan Headquarters
Conexant Systems, Taiwan Co.,
Ltd.
Room 2808, 333
Phone: (61 2) 9869 4088
Fax: (61 2) 9869 4077
International Trade Building
Keelung Road, Section 1
Taipei 110, Taiwan, ROC
Phone: (886 2) 2720 0282
Fax: (886 2) 2757 6760
Phone: (86 2) 6361 2515
Fax: (86 2) 6361 2516
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