Conexant RC1440D User manual

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Integrated V.90/K56flex

/V.34/V.32bis Modem Device Sets
for Desktop Applications
The ConexantRC56D, RC336D, and RC144D Modem
Device Set families support data/fax,
voice/TAM/telephony extensions, V.80 synchronous
access mode, host-DSVD, and optional speakerphone,
AudioSpan, and on-board DSVD functions depending
upon model (Table 1).
The modem supports the following primary data
modulations: ITU-T V.90/K56flex(RC56), V.34 (RC56
and RC336) and V.32bis. Otherwise, the modems are
identical within like models, e.g., SP models operate the
same. Unless otherwise noted, descriptions in this
document apply to all modem families and models.
The modem is designed to operate with dial-up telephone
lines in the U.S. and world-wide.
Low profile, small PQFP packages make this device set
ideal for desktop applications using parallel host or serial
DTE interface.
The device set consists of an 8-bit microcontroller (MCU)
in an 80-pin PQFP, a modem data pump (MDP) in a 100-
pin PQFP, and an optional Plug and Play (PnP) ISA Bus
Interface Device in 80-pin PQFP. The SVD model is the
same as the SP model with the addition of an RCDSVD
Speech Codec Processor (SCP) in a 100-pin PQFP to
support DSVD.
Downloadable architecture supports downloading of
modem firmware from the host/DTE to the MCU and,
transparently to the host/DTE, the downloading of MDP
code modules from the MCU.
The modem operates by executing firmware from installed
1Mbit (128k x 8) RAM and 2Mbit (256k x 8) ROM/flash
ROM. The RC336 and RC144 can alternatively use 32k x
8 RAM and 1Mbit or 2Mbit ROM/flash ROM.
In V.90/K56flex mode (RC56), the modem can receive
data at speeds up to 56 kbps from a digitally connected
V.90- or K56flex-compatible central site modem. Taking
advantage of the PSTN which is primarily digital except
for the client modem to central office local loop,
V.90/K56flex modems are ideal for applications such as
remote access to an Internet Service Provider (ISP), on-
line service, or corporate site. The modem can send data
at speeds up to V.34 rates.
In V.34 data mode (RC56 and RC336), the modem
operates at line speeds up to 33.6 kbps. Error correction
(V.42/MNP 2-4) and data compression (V.42 bis/MNP 5)
maximize data transfer integrity and boost average data
throughput up to 230.4 kbps. Non-error-correcting mode is
also supported.
In V.32 bis mode, the modem operates at line speeds up
to 14.4 kbps.
The modem supports fax Group 3 send and receive rates
up to 33.6 kbps and T.30 protocol.
In voice/TAM mode, enhanced 2-bit or 4-bit per sample
ADPCM coding and decoding at 7200 Hz sample rate
allows efficient digital storage of voice/audio. This mode
supports applications such as digital telephone answering
machine (TAM), voice annotation, and recording from and
playback to the telephone line. Other voice/TAM functions
using handset or headset are supported by SP and SVD
models. Extension pickup /remote hangup detection and
line-in-use detection telephony extensions are also
supported.
SP and SVD models support position independent, full-
duplex speakerphone (FDSP) operation using microphone
and speaker, as well as other voice/TAM applications
using handset or headset.
SP and SVD models also support AudioSpan (analog
simultaneous audio/voice and data) operation with a data
rate of 4.8 kbps with audio.
SVD models, using the optional RCDSVD SCP device,
support hardware-based (on-board) V.70 DSVD (digital
simultaneous voice and data) with speech coding per ITU-
T interoperable G.729 and G.729 Annex A with
interoperable G.729 Annex B.
Host-based DSVD is supported in all models, however,
the host PC must supply full-duplex sound support,
typically to a microphone/speaker, such as provided by
Conexant WaveArtist devices or a sound card.
A common PC board design can support data/fax, V.80,
voice/TAM/telephony extensions, speakerphone,
AudioSpan, and host- or on-board DSVD operation
depending on the installed modem and optional PnP and
RCDSVD devices.
Accelerator kits and reference designs are available to
minimize application design time and costs. PC-based
“ConfigurACE™ II for Windows” software allows MCU
firmware to be customized.
Features
•Downloadable MCU firmware from the host/DTE and
downloadable MDP code modules from the MCU
•Data modem
−ITU-T V.90 and K56flex (RC56 models)
−V.34 (33.6 kbps) (RC56 and RC336 models)
−V.32 bis, V.32, V.22 bis, V.22, V.23, and V.21
−Bell 212A and 103
−V.42 LAPM, MNP 2-4, and MNP 10 error correction
−V.42 bis and MNP 5 data compression
−MNP 10EC™ enhanced cellular performance

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2Conexant MD211
Table 1. Modem Models and Functions
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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.
K56flex is a trademark of Conexant Systems, Inc. and Lucent Technologies.
Conexant, “What's Next in Communications Technologies”, MNP 10EC, and ConfigurACE 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 owners.
©1999, Conexant Systems, Inc.
Printed in U.S.A.
All Rights Reserved.

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MD211 Conexant 3
Features (Continued)
•Fax modem send and receive rates up to 33.6 kbps
−V.34 fax, V.17, V.29, V.27 ter, and V.21 channel 2
•V.80 synchronous access mode supports host-based
communication protocols
•World-class operation
−Call progress
−Blacklisting
−Multiple country support
•Voice/TAM/telephony extensions mode
•Handset support (SP and SVD models)
•Full-duplex speakerphone (FDSP) mode (SP and SVD
models)
−Acoustic and line echo cancellation
−Microphone gain and muting
−Speaker volume control and muting
•AudioSpan simultaneous audio/voice and data (SP and
SVD models)
−ITU-T V.61 modulation (4.8 kbps data with audio)
−Handset, headset, or microphone/speaker
•ITU-T V.70 DSVD using the RCDSVD SCP (SVD models)
−ITU-T interoperable G.729 and G.729 Annex A with
interoperable G.729 Annex B
−Voice/silence detection and handset echo cancellation
−Robust DSVD timing recovery
−Handset, headset, or half-duplex speakerphone
•Host-based DSVD support with V.70 software drivers for
Windows 95
•Communication software compatible AT command sets
•NVRAM directory and stored profiles
•Flash memory support
•Internal phase-locked loop (PLL)
•Built-in host/DTE interface with speeds up to 230.4 kbps
−Parallel 16550A UART-compatible interface
−Serial ITU-T V.24 (EIA/TIA-232-E)
•Supports Conexant PnP ISA Bus Interface Device
•Supports Serial PnP interface per Plug and Play External
COM Device Specification, Rev 1.00
•Flow control and speed buffering
•Automatic format/speed sensing
•Serial sync/async data; parallel async data
•Caller ID and distinctive ring detect
•Packages:
−MCU: 80-pin PQFP
−MDP: 100-Pin PQFP
−PNP: 80-Pin PQFP
−RCDSVD SCP: 100-pin PQFP
•+5V operation
•Sleep Mode
Description
General
The modem device set, consisting of separate
microcontroller (MCU), modem data pump (MDP), optional
Plug and Play (PnP) ISA Bus Interface Device, and
optional RCDSVD Speech Codec Processor (SCP)
devices, provides the processing core for a complete
modem design.
For data/fax/V.80/voice/TAM/speakerphone/host-
DSVD/AudioSpan operation, only the microcontroller
(MCU) and modem data pump (MDP) devices are
needed. The OEM adds an MCU crystal, discrete
components, and a telephone line/telephone/voice/TAM/-
telephony extension interface circuit to complete the
modem system. Optional on-board DSVD operation is
supported with addition of the RCDSVD Speech Codec
Processor (SCP) device to an SP model (included in SVD
models). Table 1 shows the supported functions by
product family.
Dialing, call progress, V.80, telephone line interface,
voice/TAM, speakerphone, AudioSpan, and DSVD
functions are supported and controlled through the AT
command set.
Connection to the host/DTE is supported by serial DTE
interface (Figure 1) or parallel host interface (Figure 2)
depending on installed modem firmware.
For U.S. operation, the modem can operate with a 1-relay
data/fax/TAM DAA interface (Figure 3) or a 2-relay
data/fax/TAM/Speakerphone DAA interface (Figure 4).
Data/Fax Modes
In V.90/K56flex data modem mode (RC56), the modem
can receive data from a digital source using a V.90- or
K56flex-compatible central site modem at line speeds up
to 56 kbps. Asymmetrical data transmission supports
sending data at speeds up to V.34 rates. This mode can
fallback to full-duplex V.34 mode.
In V.34 data modem mode, the modem can operate in 2-
wire, full-duplex, asynchronous modes at line rates up to
33.6 kbps. Data modem modes perform complete
handshake and data rate negotiations. Using V.34
modulation to optimize modem configuration for line
conditions, the modem can connect at the highest data
rate that the channel can support from 33.6 kbps to 300
bps with automatic fallback. Automode operation in V.34
is provided in accordance with PN3320 and in V.32 bis in
accordance with PN2330. All tone and pattern detection
functions required by the applicable ITU or Bell standard
are supported.
In fax modem mode, the modem can operate in 2-wire,
half-duplex, synchronous mode and can support Group 3
facsimile send and receive speeds of 33600, 31200,
28800, 26400, 24000, 21600, 19200, 16800, 14400,
12000, 9600, 7200, 4800, and 2400 bps. Using V.34
modulation to optimize modem configuration for line
conditions, the modem can connect at the highest data
rate that the channel can support at speeds up to 33.6
kbps with automatic rate adaption. Fax data transmission
and reception performed by the modem are controlled and
monitored through the EIA/TIA-578 Fax Class 1, T.31 Fax
Class 1.0, or Fax Class 2 command interface. Full HDLC
formatting, zero insertion/deletion, and CRC
generation/checking are provided.
Both transmit and receive fax data are buffered within the
modem. Data transfer to and from the DTE is flow
controlled by XON/XOFF and RTS/CTS.

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4Conexant MD211
1154F1-1 BD-Ser
TELEPHONE
LINE/
TELEPHONE
HANDSET/
TELEPHONY
EXTENSIONS/
AUDIO
INTERFACE
CIRCUIT
TELEPHONE
LINE
TEL HANDSET
MICROPHONE
HEADPHONE/
SPEAKER
SERIAL
DTE/
INDICATOR
INTERFACE
256 x 8
SERIAL
NVRAM
(OPTIONAL)
MODEM DEVICE SET
MICRO
CONTROLLER
UNIT
(MCU)
[80-PIN PQFP]
MODEM
DATA PUMP
(MDP)
[100-PIN PQFP]
RCDSVD
SPEECH
CODEC
PROCESSOR
(SCP)
[R6715-14,
100-PIN PQFP]
(OPTIONAL)
ROM/FLASH ROM
2M (256K x 8)
[RC56/RC336/RC144]
or 1M (128K x 8)
[RC336/RC144]
RAM
1M (128K x 8)
[RC56/RC336/RC144]
or 32K x 8
[RC336/RC144]
Figure 1. Block Diagram - Serial DTE Interface
1154F1-2 BD-Par
TELEPHONE
LINE/
TELEPHONE
HANDSET/
TELEPHONE
EXTENSIONS/
AUDIO
INTERFACE
CIRCUIT
TELEPHONE
LINE
TEL HANDSET
MICROPHONE
HEADPHONE/
SPEAKER
MODEM DEVICE SET
MICRO
CONTROLLER
UNIT
(MCU)
[80-PIN PQFP]
MODEM
DATA PUMP
(MDP)
[100-PIN PQFP]
PARALLEL
HOST
BUS
INTERFACE
RCDSVD
SPEECH
CODEC
PROCESSOR
(SCP)
[R6715-14,
100-PIN PQFP]
(OPTIONAL)
256 x 8
SERIAL
NVRAM
(OPTIONAL)
PnP
INTERFACE
DEVICE
[11596-21:
80-PIN PQFP]
(OPTIONAL)
ROM/FLASH ROM
2M (256K x 8)
[RC56/RC336/RC144]
or 1M (128K x 8)
[RC336/RC144]
RAM
1M (128K x 8)
[RC56/RC336/RC144]
or 32K x 8
[RC336/RC144]
Figure 2. Block Diagram - Parallel Host Interface

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MD211 Conexant 5
MODEM
DEVICE SET
1154F1-3 AIF 2R-US
TELEPHONE LINE/TELEPHONE HANDSET/
TELEPHONY EXTENSIONS INTERFACE CIRCUIT
HEADPHONE
MICROPHONE
RINGD
~OH
VC
BIAS
AMP/
SOUNDUCER
(OPTIONAL)
AUDIO/HEADPHONE
INTERFACE CIRCUIT
SSI &
BRDGE OH RELAY
HYBRD
&
XFRMR
TEL LINE
TEL HANDSET
SURG
PROT
MICV*
SPK
TXA1
RIN
TXA2
RNG
DET
* SP OR SVD MODELS.
** NON-(SP OR SVD) MODELS.
EXTENSION
PICKUP/
REMOTE
HANG-UP
~EXTOH
MICM**
Figure 3. 1-Relay Data/Fax/TAM DAA Interface (U.S.)
MODEM
DEVICE SET
(SP/SVD MODELS)
1154F1-4 AIF 2R-US
TELEPHONE LINE/TELEPHONE HANDSET/
TELEPHONY EXTENSIONS INTERFACE CIRCUIT
HEADPHONE
MICROPHONE
LCS
RINGD
~VOICE
~OH
VC
BIAS
AMP/
SOUNDUCER
(OPTIONAL)
AUDIO/HEADPHONE
INTERFACE CIRCUIT
SSI &
BRDGE OH RELAY
HYBRD
&
XFRMR
TEL LINE
TEL HANDSET
VOICE
RELAY LCS
CUR
SRC
RNG
DET
SURG
PROT
MICV
SPK
HANDSET
HYBRID
TELOUT
TELIN
TXA1
RIN
TXA2
EXTENSION
PICKUP/
REMOTE
HANG-UP
~EXTOH
Figure 4. 2-Relay Data/Fax/TAM/Speakerphone/AudioSpan DAA Interface (U.S.)

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6Conexant MD211
Synchronous Access Mode (SAM)
V.80 synchronous access mode between the modem and
the host/DTE is provided for host-based communication
protocols, e.g., H.324 video conferencing applications.
Voice-call-first (VCF) before switching to a videophone
call is also supported.
World Class Operation
W-class functions support modem operation in multiple
countries. Additional capabilities are provided in addition
to the data modem functions in areas such as for dialing,
carrier transmit level, calling tone, call progress tone
detection, answer tone detection, blacklisting, relay
control. Country dependent parameters are programmable
by ConfigurACE II for Windows.
Voice/TAM Mode
Voice/TAM Mode features include enhanced ADPCM
compression/decompression, tone detection/generation
and call discrimination, concurrent DTMF detection, and
8-bit monophonic audio data encoding.
Voice/TAM Mode is supported by three submodes:
1. Online Voice Command Mode supports connection to
the telephone line or, for SP and SVD models, a
handset.
2. Voice Receive Mode supports recording voice or
audio data input at the RIN pin, typically from the
telephone line or, for SP and SVD models, a
microphone/handset.
3. Voice Transmit Mode supports playback of voice or
audio data to the TXA1/TXA2 output, typically to the
telephone line or, for SP and SVD models, a
speaker/handset.
Telephony Extension Operation
Extension pickup/remote hangup detection and line-in-use
detection are supported.
Speakerphone Mode (SP and SVD Models)
The speakerphone mode features an advanced
proprietary speakerphone algorithm which supports full-
duplex voice conversation with both acoustic and line
echo cancellation. Parameters are constantly adjusted to
maintain stability with automatic fallback from full-duplex
to pseudo-duplex operation. The speakerphone algorithm
allows position independent placement of microphone and
speaker.
The speakerphone mode provides hands-free full-duplex
telephone operation under host control. The host can
separately control volume, muting, and AGC in
microphone and speaker channels.
AudioSpan Mode (SP and SVD Models)
AudioSpan provides full-duplex analog simultaneous
audio/voice and data over a telephone line at a data rate
of 4800 bps with audio using V.61 modulation. AudioSpan
can send any type of audio waveform, including music.
Data can be sent with or without error correction. The
audio/voice interface can be in the form of a headset,
handset, or a microphone and speaker. Handset echo
cancellation is provided.
DSVD Mode using RCDSVD SCP Device (SVD Models)
On-board DSVD operation requires installation of the
optional RCDSVD SCP (R6715-14).
DSVD provides full-duplex digital simultaneous voice and
data over a single telephone line. DSVD uses codecs in
the RCDSVD SCP to code (compress) analog speech
signal on the RCDSVD LINEIN pin or MICIN pin for
passing to the modem controller in digitized form, and to
decode (decompress) coded speech received from the
modem controller for routing to the RCDSVD LINEOUT
pin or SPKP/SPKN pins in analog form.
DSVD operates in accordance with ITU-T interoperable
G.729 and G.729 Annex A with interoperable G.729
Annex B. Voice activity detection supports speech coding
at average bit rate significantly lower than 8.0 kbps.
DSVD decoder timing recovery algorithm compensates for
clock skew, asynchronous host-to-decoder data transfer
delay, intervening variable length data block transmission
delay, and loss of encoded speech data.
The voice interface can be in the form of a headset,
handset or a microphone and speaker (half-duplex
speakerphone). Handset echo cancellation supports
handset use through a hybrid.
In Handset Mode, the RCDSVD SCP interfaces to the
telephone interface circuit using the Line Input (LINEIN)
and Line Out (LINEOUT) lines. In Headset or
Speakerphone Mode, the RCDSVD SCP interfaces to the
audio interface circuit using the Microphone Input (MICIN)
and Speaker out (SPKR) lines.
Host-Based DSVD
All modem models support host-based ITU-T V.70 DSVD.
The RCDSVD SCP (R6715) is not required. V.70 software
drivers for Windows 95 are provided which support a
speech/audio bit rate of significantly less than 8.0 kbps by
implementing interoperable G.729 and G.729 Annex A
with interoperable G.729 Annex B. The minimum PC
performance recommended for host-based DSVD is 150
MHz Pentium or equivalent. The V.70 software drivers
require about 10% of the MIPS available in a Pentium 150
MHz class PC. The host PC must supply full-duplex
sound support, typically to a microphone/speaker, such as
provided by Conexant WaveArtist devices or a sound
card. The modem is configured for host-based V.70 via
AT commands, and, when using a TAPI-compliant
communication application, the V.70 software drivers will
automatically run upon a successful V.70 connection.
Sleep Mode
Sleep Mode is supported in the modem device set and the
RCDSVD SCP device.
Modem Data Pump (MDP)
The data/fax/voice/optional speakerphone modem data
pump (MDP) is a Conexant R6764 packaged in a 100-pin
PQFP. The input clock frequency is 28.224 MHz and can
be supplied by the MCU. An internal phase locked loop
(PLL) circuit supports 56.448 MHz internal operation. The
operating voltage is +3.3V, which can be supplied by the
MCU, with +5V tolerant inputs. The MDP supports +5V
analog signal interface.

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MD211 Conexant 7
In V.90/K56flex data modem mode (RC56), the MDP can
receive data from a digital source using a V.90- or
K56flex-compatible central site modem at line speeds up
to 56 kbps. Asymmetrical data transmission supports
sending data at speeds up to V.34 rates.
In V.34 data modem mode, the MDP can operate in 2-
wire, full-duplex, synchronous/asynchronous modes at
line rates up to 33.6 kbps. Using V.34 modulation to
optimize modem configuration for line conditions, the MDP
can connect at the highest data rate that the channel can
support from 33.6 kbps to 300 bps with automatic fallback.
Automode operation in V.34 is provided in accordance
with PN3320 and in V.32 bis in accordance with PN2330.
In fax modem mode, the MDP supports Group 3 facsimile
send and receive speeds of speeds of 33600, 31200,
28800, 26400, 24000, 21600, 19200, 16800, 14400,
12000, 9600, 7200, 4800, and 2400 bps.
ADPCM voice processing is supported.
Downloading of MDP code from the MCU is supported.
Microcontroller (MCU)
The MCU is a Conexant 8-bit microcomputer with pins to
support host/ DTE, MDP, voice/audio/speakerphone, and
optional RCDSVD SCP interface operation. The operating
voltage is +5V. The MCU provides a +3.3V output to
power the MDP.
The MCU connects to the host via a V.24 (EIA/TIA-232-E)
serial interface or a parallel microcomputer bus depending
on installed MCU firmware.
The MCU performs the command processing and host
interface functions. The crystal frequency is 28.224 MHz.
The MCU outputs a 28.224 MHz clock to the MDP
eliminating need for a separate MDP crystal circuit.
The MCU connects to the MDP via dedicated lines and
the external bus. The external bus also connects to OEM-
supplied RAM and ROM/flash ROM, and to the optional
RCDSVD SCP.
The MCU connects to an optional 256-byte serial
EEPROM over a dedicated serial interface.
The MCU is packaged in an 80-pin PQFP.
RCDSVD Speech Codec Processor (SCP) (Optional)
The RCDSVD SCP (R6715-14), required for on-board
DSVD operation, is packaged in a 100-pin PQFP. The
56.448 MHz crystal frequency is supplied by the MDP
XCLK output.
Plug and Play (PnP) ISA Bus Interface Device (PNP
Models)
The Conexant Plug and Play (PnP) ISA Bus Interface
Device (11596-21) is an 80-pin PQFP VLSI device that
supports automatic configuration of an Industry Standard
Architecture (ISA) modem card operating on a personal
computer (PC) with PnP capability. The PnP Device
supports host performance of the following functions when
interfacing with the PnP ISA card:
•Isolate the ISA card
•Read the card's resource data
•Identify the card and configure its resources
The PnP Device meets the requirements stated in the
Plug and Play ISA Specification Version 1.0a.
See Plug and Play (PnP) ISA Bus Interface Device Data
Sheet (Order No. MD144) for additional information.
MCU Firmware
MCU firmware performs processing of general modem
control, command sets, data modem, error correction and
data compression (ECC), fax class 1, fax class 2, DSVD,
AudioSpan, voice/audio/TAM/speakerphone, W-class,
V.80, and serial DTE/parallel host interface functions
according to modem models (Table 1).
Configurations of the modem firmware are provided to
support parallel host bus or serial DTE interface
operation.
The modem firmware is provided in object code form for
the OEM to program into external ROM/flash ROM. The
modem firmware may also be provided in source code
form under a source code addendum license agreement.
Supported Interfaces
The major hardware signal interfaces of the modem
device set are identified in Figure 1 (serial DTE interface)
and Figure 2 (parallel host bus interface).
Serial DTE Interface and Indicator Outputs
A V.24/EIA/TIA-232-E logic-compatible serial DTE
interface is selected by the Parallel/Serial Interface
(PARIF) input low. One serial transmit data input line
(~TXD), one serial receive data output line (~RXD), three
synchronous clocks (~XTCLK, ~RXCLK, and ~TXCLK),
four control input lines (~DTR, ~RTS, ~RDL, and ~AL),
and six status output lines (~CTS, ~DSR, ~RLSD, ~TM,
~RI, and ~DRSOUT) are supported.
Three dedicated indicator output lines (~DTRIND,
~TMIND, and ~AAIND) are also provided.
Parallel Host Bus Interface
A 16550A UART-compatible parallel host bus interface is
selected by Parallel/Serial Interface (PARIF) input high.
The interface signals are: eight bidirectional data lines
(HD0-HD7), three address input lines (HA0-HA2), three
control input lines (~HCS, ~HRD, and ~HWT), one status
output line (HINT), and a reset input line (-RESET).
NVRAM (Serial EEPROM) Interface
A 2-line serial interface to non-volatile RAM (NVRAM, i.e.
serial EEPROM) is supported. The interface signals are a
bidirectional data line (NVMDATA) and a clock output line
(NVMCLK). Data stored in NVRAM can take precedence
over the factory default settings. A 256-byte NVRAM can
store up to two user-selectable configurations and up to
four 32-digit dial strings.
External Bus Interface
The non-multiplexed external bus supports eight
bidirectional data lines (D0-D7) and 18 address output
lines (A0-A17). Read enable output (~READ), write
enable output (~WRITE), and four chip select output
(~ROMSEL, ~RAMSEL, ~DPSEL, and ~SCPSEL) lines
are also supported.

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8Conexant MD211
The external bus connects to the MDP, the optional
RCDSVD SCP, and to OEM-supplied memory. The
memory is 1Mbit (128k x 8) SRAM and 2Mbit (256k x 8)
ROM/flash ROM, or for the RC336 and RC144, can
alternatively be 32k x 8 SRAM and 128k x 8 ROM/flash
ROM.
Telephone Line/Telephone Interface
MCU. Relay control outputs to the line interface are
supported:
•~RLY1: Off-hook (~OH)
•~RLY2: Voice (~VOICE), if needed. Pulse (~PULSE) relay
function can be enabled by ConfigurACE II.
•~RLY3: Mute (~MUTE), if needed, can be enabled by
ConfigurACE II.
•~RLY4: Caller ID (~CALLID) if needed. The DAAs shown
in Figure 3 and Figure 4 support the Caller ID function
without use of a separate relay.
Ring signal (RINGD) and loop current sense (LCS) inputs
are supported.
Telephony extensions are supported by the Extension Off-
Hook (~EXTOH) input.
MDP. A single-ended receive analog input (RIN) and a
differential transmit analog output (TXA1/TXA2) are
supported. A digitized speaker output (SPKMD) is
provided for call progress monitoring.
Speakerphone Interface (SP and SVD Models)
Microphone input (MICV) and a speaker output (SPKM)
lines connect to handset, headset, or a microphone and
speaker to support functions such as AudioSpan headset
and speakerphone modes, FDSP, telephone emulation,
microphone voice record, speaker voice playback, and
call progress monitor. The speaker output (SPKM) carries
the normal speakerphone audio or reflects the received
analog signals in the modem.
An input from the telephone microphone (TELIN) and an
output to the telephone speaker (TELOUT) are supported
in AudioSpan modes. These lines connect voice
record/playback and AudioSpan audio to the local
handset.
RCDSVD SCP Interface (SVD Models)
The Line In (LINEIN) and Line Out (LINEOUT) lines
connect DSVD audio to the local telephone handset.
Microphone input (MICIN) and speaker output (SPKP)
lines connect to the microphone and speaker to support
DSVD headset and speakerphone modes.
Hardware Interface Signals
The modem hardware interface signals are shown in
Figure 5 (serial DTE interface) and Figure 6 (parallel host
interface).
The MCU pin assignments for the 80-pin PQFP with serial
DTE interface are shown in Figure 7.
The MCU pin assignments for the 80-pin PQFP with
parallel host interface are shown in Figure 8.
The MDP pin assignments for the 100-pin PQFP are
shown in Figure 9.
The RCDSVD SCP pin assignments for the 100-pin PQFP
are shown in Figure 10.
Electrical and Environmental Specifications
The current and power requirements are listed in Table 2.
The absolute maximum ratings are listed in Table 3.
Additional Information
Additional information is described in the RC56D,
RC336D, and RC144D Designer’s Guide (Order No.
1154), the Plug and Play (PnP) ISA Bus Interface Device
Data Sheet (Order No. MD144), the RCDVSD Speech
Codec Processor Device Hardware Description (Order
No. 1087), and the AT Command Reference Manual
(Order No. 1199).

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MD211 Conexant 9
MICRO
CONTROLLER
UNIT
(MCU)
1154F3-1 IF Ser
MODEM
DATA
PUMP
(MDP)
RS0-RS4
~CS
EXTERNAL
BUS
RIN
TXA1
TXA2
TELIN*
TELOUT*
MICV*
SPKM
MICM**
DPIRQ
~READ
~WRITE
A0-A17
D0-D7
~DPSEL
~ROMSEL
~RAMSEL
~READ
~WRITE
A0-A4
D0-D7
~DPSEL
TELEPHONE
LINE
TELEPHONE
HANDSET
MICROPHONE
TELEPHONE
LINE/
TELEPHONE
HANDSET/
AUDIO
INTERFACE
CIRCUIT
HEADPHONE/
SPEAKER
IRQ
~RES1
~RES2
A0-A16
D0-D7
~READ
~WRITE
~RAMSEL
A0-A17
D0-D7
~READ
~WRITE
~ROMSEL
VGG
AVDD
VAA
DGND, AGND
VCC (+5V)
VCC (+5V)
VCC (+5V)
CLKIN
VDD
CLKOUT
VD3.3
RCDSVD
SCP
(R6715)
~RESET
~CS
~IRQ1
A0-A4
D0-D7
~READ
~WRITE
MICIN
SPKP
LINEIN
LINEOUT
~WKRESOUT
~SCPSEL
~SCPIRQ*
DGND, AGND VDD
AVDD
VAA
VCC (+5V)
VCC (+5V)
VCC (+5V)
VDD
VCC (+5V)
DGND
NVMDATA
NVMCLK
NVRAM
(OPTIONAL)
MODEM
CRYSTAL
CIRCUIT
XTLI
XTLO
~EXTOH
~RLY1 (~OH)
~RLY2 (~VOICE)
~RLY3 (~MUTE)
~RLY4 (~CALLID)
LCS
RINGD
DTE
SERIAL/
INDICATOR
INTERFACE
~XTCLK
~TXCLK
~RXCLK*
~
TXD
~ RXD
~ CTS
~ DSR
~ RLSD
~ TM
~ RI
~DRSOUT
~ DTR
~ RTS
~ RDL
~ AL
~DTRIND
~TMIND
~AAIND
RESET
CIRCUIT ~RESET
~WKRES
~RESET ~RESET
XTLI
XCLK
~XTCLK
TDCLK
~RDCLK
~TXD
~DPRXD RXD
PARIF
* SP OR SVD MODELS.
** NON-(SP OR SVD) MODELS.
ROM/FLASH ROM
2M (256K x 8) [RC56/RC336/RC144]
1M (128K x 8) [RC336/RC144]
RAM
1M (128K x 8) [RC56/RC336/RC144]
32K x 8 [RC336/RC144]
Figure 5. Hardware Interface Signals - Serial DTE Interface

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10 Conexant MD211
MICRO
CONTROLLER
UNIT
(MCU)
1154F3-2 IF Par
MODEM
DATA
PUMP
(MDP)
RS0-RS4
~CS
EXTERNAL
BUS
RIN
TXA1
TXA2
TELIN*
TELOUT*
MICV*
SPKM
MICM**
~EXTOH
~RLY1 (~OH)
~RLY2 (~VOICE)
~RLY3 (~MUTE)
~RLY4 (~CALLID)
LCS
RINGD
DPIRQ
~READ
~WRITE
A0-A17
D0-D7
~DPSEL
~ROMSEL
~RAMSEL
~READ
~WRITE
A0-A4
D0-D7
~DPSEL
TELEPHONE
LINE
TELEPHONE
HANDSET
MICROPHONE
TELEPHONE
LINE/
TELEPHONE
HANDSET/
AUDIO
INTERFACE
CIRCUIT
HEADPHONE/
SPEAKER
IRQ
~RES1
~RES2
PARALLEL
HOST
BUS
INTERFACE
HD0-HD7
HA0-HA2
~HCS
~HWT
~HRD
HINT
~RES
A0-A16
D0-D7
~READ
~WRITE
~RAMSEL
A0-A17
D0-D7
~READ
~WRITE
~ROMSEL
VGG
AVDD
VAA
DGND, AGND
VCC (+5V)
VCC (+5V)
VCC (+5V)
CLKIN
VDD
CLKOUT
VD3.3
RCDSVD
SCP
(R6715)
~RESET
~CS
~IRQ1
A0-A4
D0-D7
~READ
~WRITE
MICIN
SPKP
LINEIN
LINEOUT
~WKRESOUT
~SCPSEL
~SCPIRQ
DGND, AGND VDD
AVDD
VAA
VCC (+5V)
VCC (+5V)
VCC (+5V)
VDD
VCC (+5V)
DGND
NVMDATA
NVMCLK
NVRAM
(OPTIONAL)
MODEM
CRYSTAL
CIRCUIT
XTLI
XTLO ~WKRES
~RESET
~RESET
XTLI
XCLK
PARIF
NC
* SP OR SVD MODELS.
** NON-(SP OR SVD) MODELS.
ROM/FLASH ROM
2M (256K x 8) [RC56/RC336/RC144]
1M (128K x 8) [RC336/RC144]
RAM
1M (128K x 8) [RC56/RC336/RC144]
32K x 8 [RC336/RC144]
Figure 6. Hardware Interface Signals - Parallel Host Interface

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MD211 Conexant 11
1154F3-3 PO-MCU80F-Ser
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
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
~RES
~NMI
~WRITE
~READ
~RLY3
~RLY4
PSC
VDD
XTLI
XTLO
VD3.3
GND
~DSR
~CTS
~RLSD
~DRSOUT
~AAIND
~RI
~TM
~RDL
~DTRIND
RESERVED RESERVED
~STPMODE
~DTR
~AL
~RTS
DPIRQ
GND
LCS
CLKOUT
RINGD
NVMDATA
~TXD
~TXCLK
~RXCLK/~SCPIRQ
~DPRXD
~RXD
NVMCLK
~TST
A6
A5
A4
A3
A2
A1
A0
GND
GND
VDD
~EXTOH
PARIF
D7
D6
D5
D4
D3
D2
D1
D0
~TMIND ~WKRESOUT ~SCPSEL A17 ~RAMSEL ~ROMSEL ~DPSEL A16 GND ~RLY2 (~VOICE) ~RLY1(~OH) A15 A14 A13 A12 A11 A10 A9 A8 A7
Figure 7. MCU Pin Signals - 80-Pin PQFP - Serial DTE Interface
1154F3-4 PO-MCU80F-Par
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
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
~RES
~NMI
~WRITE
~READ
~RLY3
~RLY4
PSC
VDD
XTLI
XTLO
VD3.3
GND
HD0
HD1
HD2
HD3
HD4
HD5
HD6
HD7
HA0 HA1 HA2
~STPMODE
~HCS
~HWT
~HRD
DPIRQ
GND
LCS
CLKOUT
RINGD
NVMDATA
RESERVED RESERVED
~SCPIRQ
RESERVED RESERVED
NVMCLK
~TST
A6
A5
A4
A3
A2
A1
A0
GND
GND
VDD
~EXTOH
PARIF
D7
D6
D5
D4
D3
D2
D1
D0
HINT ~WKRESOUT ~SCPSEL A17 ~RAMSEL ~ROMSEL ~DPSEL A16 GND ~RLY2 (~VOICE) ~RLY1(~OH) A15 A14 A13 A12 A11 A10 A9 A8 A7
Figure 8. MCU Pin Signals- 80-Pin PQFP - Parallel Host Interface

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12 Conexant MD211
MD212F5 PO-R6764-100P
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
45
46
47
48
49
50
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
PLLGND
GND
PLLVDD
RS1
RS0
D7
D6
D5
D4
D3
D2
D1
D0
NC
CLKIN
VDD
RESERVED
RESERVED
GP00
GND
TXA2
VREF
VC
MICV/NC*
RIN
~RES2
MICM
SPKMD
AGND
AVDD
MCNTRLSIN
MCLKIN
MTXSIN
MSCLK
MRXOUT
MSTROBE
~RLYA
AGND
GND
VSTROBE/NC*
IRQ
RINGD
~RI
RESERVED
XCLK
YCLK
RESERVED
RESERVED
RESERVED
VGG
RESERVED
SLEEPO
VDD
RXD
RESERVED
GND
XTCLK
VDD
SR1IO
RESERVED
SR2IO
SA2CLK
RESERVED
RESERVED
IASLEEP
VCNTRLSIN/NC*
VCLKIN/NC*
VTXSIN/NC*
VSCLK/NC*
VRXOUT/NC*
RESERVED
RS2
RS3
RS4
~CS
~WRITE
~READ
~RDCLK
~WKRES
SR2CLK
~RLSD
TDCLK
TXD
RESERVED
RESERVED
GND
~RES1
SR4OUT
SR3OUT
SR4IN
SR3IN
CLKOUT
SA1CLK
IA1CLK
AGND
TELIN/NC*
TELOUT/NC*
AVAA
SPKR
TXA1
* NC on non-SP models.
Figure 9. MDP Pin Signals - 100-Pin PQFP

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MD211 Conexant 13
1087F2-4 RCDSVD 100Q
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
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
VSS
SR3IN
NC
VDD
NC
NC
XTLO
XTLI
~RESET
~SLEEPO
NC
NC
~IRQ
NC
VSS
NC
GPO4
GPO5
GPO6
GPO7
NC
NC
VDD
NC
NC
NC
NC
~READ
~CS
NC
RS4
RS3
RS2
RS1
RS0
VDD
D7
D6
D5
D4
D3
D2
D1
D0
~WRITE
ADVSS
NC
NC
VC
VREF
VSS
NC
RBIAS
MICIN
AVSS
LINEIN
AVDD
NC
NC
ADVSS
NC
LINEOUT
SPKN
SPKP
NC
FSYNC
ICLK
NC NC
REFCNTL
NC NC
VSS
~IARESET
MCLK
ADVDD
SIN
SOUT
CTRLSIN
IACLK
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
NC NC NC VSS NC NC ~EN85 NC NC NC SR4OUT NC SR1IO SA1CLK IA1CLK NC NC NC NC VSS
Figure 10. RCDSVD SCP Pin Signals- 100-Pin PQFP

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14 Conexant MD211
Table 2. Current and Power Requirements
Current (ID) Power (PD)
Mode Typical Current (mA) Maximum Current (mA) Typical Power (mW) Maximum Power (mW) Notes
MCU (L28) fIN = 28.224 MHz
Normal mode 68 72 340 380
Sleep mode 8 8.6 40 45
MDP (R6764) fIN = 28.224 MHz
Normal mode 85 90 280 325
Sleep mode 53 — 175 —
Total Modem (MCU and MDP)
Normal mode 153 162 620 705
Sleep 61 — 215 —
Optional PnP Device
(11596-21)
Normal mode 27 40 135 210
Optional RCDSVD SCP
(R6715) fIN = 56.448 MHz
Normal mode 110 120 550 630
Sleep 10 — 50 —
Notes:
1. Test conditions: MCU, PnP, and SCP: VDD = +5.0 VDC for typical values; VCC = +5.25 VDC for maximum values.
MDP: VDD = +3.3 VDC for typical values; VCC = +3.6 VDC for maximum values.
2. Normal operating voltage: MCU, PnP, and SCP: VDD = +5.0 V ± 5%.
MDP: VDD = +3.3 V ± 0.3 V.
Table 3. Absolute Maximum Ratings
Parameter Symbol Limits Units
Supply Voltage VDD MCU: -0.5 to +6.0
MDP: -0.5 to +4.0 V
Input Voltage VIN -0.5 to (VDD +0.5) V
Operating Temperature Range TA-0 to +70 °C
Storage Temperature Range TSTG -55 to +125 °C
Analog Inputs VIN -0.3 to (VAA + 0.3) V
Voltage Applied to Outputs in High Impedance (Off) State VHZ -0.5 to (VDD + 0.5) V
DC Input Clamp Current IIK ±20 mA
DC Output Clamp Current IOK ±20 mA
Static Discharge Voltage (25°C) VESD ±2500 V
Latch-up Current (25°C) ITRIG ±400 mA

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MD211 Conexant 15
NOTES

Further Information
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www.conexant.com
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P. O. Box 12660
Herzlia 46733, Israel
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Shimomoto Building
1-46-3 Hatsudai,
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Room 2808, 333
International Trade Building
Keelung Road, Section 1
Taipei 110, Taiwan, ROC
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SO990121