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Introduction
The Rockwell RS56L-PCI (SoftK56) Host-Processed
V.90/K56flex™ Modem Device supports high speed
analog data up to 56 kbps, 14.4 kbps fax, voice/TAM,
cellular phone, and speakerphone (optional) operation.
The modem operates with PSTN telephone lines as well
as analog and digital cellular phones in the U.S. and
world-wide depending upon model and installed software
drivers. The modem models are listed in Table 1.
The modem is packaged in a single 144-pin thin quad flat
pack (TQFP) that combines the PCI Bus Interface (BIF)
and Line/Voice Codec (LVC) functions. Figure 1 identifies
the major hardware signal interfaces supported by each
model.
Host modem and cellular phone driver software is
provided.
Operating with +3.3V power, this device set supports 32-
bit host applications in such cellular-based mobile designs
as laptop, notebook, and palmtop computers. The device
is easily integrated into PCI Bus-based embedded
motherboards, system boards, or plug-in cards.
Modem data pump and controller functions, traditionally
enabled using dedicated hardware, are processed in a
Pentium MMX-compatible CPU using host-signal
processing modem software.
In ITU-T V.90/K56flex data mode, the modem can receive
data at speeds up to 56 kbps from a digitally connected
V.90 or K56flex-compatible central site modem. A
V.90/K56flex modem takes advantage of the PSTN which
is primarily digital except for the client modem to central
office local loop and is ideal for applications such as
remote access to an Internet Service Provider (ISP), on-
line service, or corporate site. In this mode, the modem
can transmit data at speeds up to V.34 rates.
In V.34 data mode, the modem operates at line speeds up
to 33.6 kbps. When applicable, error correction
(V.42/MNP 2-4) and data compression (V.42 bis/MNP 5)
maximize data transfer integrity and boost average data
throughput. Non-error-correcting mode is also supported.
All models support remote audio recording and remote
audio playback over the telephone line interface using A-
Law,
µ-Law,
or linear coding at 8000 or 7200 Hz sample
rate to support applications such as digital telephone
answering machine (TAM) and voice annotation.
The SP model also supports position independent, full-
duplex speakerphone (FDSP) operation.
Fax Group 3 send and receive rates are supported up to
14.4 kbps with T.30 protocol.
V.80 synchronous access mode supports host-controlled
communication protocols, e. g., H.324 video conferencing.
Cellular phone operation is supported by a generic
hardware interface meeting multiple standards and host
software specific to a particular cell phone type.
Reference designs are available to minimize application
design time and costs.
Features
•
Data modem
−
ITU-T V.90, K56flex, V.34 (33.6 kbps), V.32 bis, V.32,
V.22 bis, V.22, V.23, and V.21; Bell 212A and 103
−
V.42 LAPM and MNP 2-4 error correction
−
V.42 bis and MNP 5 data compression
−
V.250 (ex V.25 ter) and V.251 (ex V.25 ter Annex A)
commands
•
Fax modem send and receive rates up to 14.4 kbps
−
ITU-T V.17, V.29, V.27 ter, and V.21 channel 2
−
EIA/TIA 578 Class 1 and T.31 Class 1.0 commands
•
Voice, telephony, TAM
−
V.253 commands
−
8-bit
µ-Law/A-Law
coding (G.711)
−
8-bit/16-bit linear coding
−
8000/7200 Hz sample rate
−
Music on hold from host or analog hardware input
−
TAM support with concurrent DTMF detect, ring
detect, and caller ID
•
V.80 synchronous access mode supports host-controlled
communication protocols
−
H.324 interface support
•
V.8/V.8bis and V.251 (ex V.25 ter Annex A) commands
•
Data/Fax/Voice call discrimination
•
Switching to/from data and fax
•
Full-duplex Speakerphone (FDSP) Mode (SP model)
−
External microphone and speaker interface
−
Microphone gain and muting
−
Speaker volume control and muting
−
Adaptive acoustic and line echo cancellation
−
Loop gain control, transmit and receive path AGC
•
Cellular phone interface
−
Hardware interface supports multiple standards
−
Cell phone specific software supports different types
and models
•
Multiple country support
−
Call progress, blacklisting
•
Single profile stored in host
•
Modem and audio paths concurrent across PCI bus
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•
Supports PCI Bus Power Management
−
Conforms to PCI Bus Power Management
Specification, Rev. 1.1
−
ACPI Power Management Registers
−
APM support
−
PME# support
•
Thin package supports low profile designs
−
R6794: 144-pin TQFP (1.6 mm max. height)
•
+3.3V operation with +5V tolerant digital inputs
•
+5V or +3.3V analog operation
Features (Continued)
•
System compatibilities
−
Windows 95, Windows 95 OSR2, Windows 98,
Windows NT 4.0, Windows NT 5.0 operating systems
−
Microsoft's PC 98 Design Initiative compliant
−
Unimodem/V compliant
•
32-bit PCI Local Bus interface
−
Conforms to the PCI Local Bus Specification,
Production Version, Revision 2.1
−
PCI Bus Mastering interface to the LVC
−
33 MHz PCI clock support
Table 1. Modem Models and Functions
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K56flex is a trademark of Rockwell International and Lucent Technologies.
MNP is a trademark of Compaq Computer Corporation.
Microsoft and Windows are registered trademarks of Microsoft Corporation.
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CELLULAR
INTERFACE
CELLULAR
PHONE
RS56L-PCI SINGLE DEVICE
PCI BUS
COMBINED BUS INTERFACE
AND LINE CODEC (LC)
[R6794-14: 144-PIN TQFP]
PSTN
TELEPHONE LINE
DIGITAL SPEAKER
(CALL PROGRESS)
TELEPHONE LINE
INTERFACE CIRCUIT
a. Data/Fax Model Interface
CELLULAR
INTERFACE
CELLULAR
PHONE
RS56L/SP-PCI SINGLE DEVICE
PCI BUS
COMBINED BUS INTERFACE
AND LINE/VOICE CODEC (LVC)
[R6794-11: 144-PIN TQFP]
PSTN
TELEPHONE LINE
TELEPHONE LINE/
MIC AND SPEAKER
INTERFACE CIRCUIT
DIGITAL SPEAKER
(CALL PROGRESS)
SPEAKER
MIC
b. Data/Fax/Voice/Speakerphone Model Interface
MD232F1-GHI
Figure 1. Modem Major Hardware Signal Interfaces
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Description
General
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Class 1.0 command interface. Full HDLC formatting, zero
insertion/deletion, and CRC generation/checking are
provided.
Synchronous Access Mode (SAM) - Video
Conferencing
V.80 synchronous access mode between the modem and
the host/DTE is provided for host-controlled
communication protocols, e.g., H.324 video conferencing
applications.
Voice-call-first (VCF) before switching to a videophone
call is also supported.
Voice/TAM Mode
Voice/TAM Mode features include 8-bit
µ-Law,
A-Law, and
linear coding at 8000 Hz and 7200 Hz sample rates. Tone
detection/generation, call discrimination, and concurrent
DTMF detection are also supported. ADPCM (4-bit IMA)
coding is also supported to meet Microsoft WHQL logo
requirements.
Voice/TAM Mode is supported by three submodes:
1.
Online Voice Command Mode supports connection to
the telephone line or, for the SP model, a
microphone/speaker.
Voice Receive Mode supports recording voice or
audio data input at the RIN pin, typically from the
telephone line or, for the SP model, a microphone.
Voice Transmit Mode supports playback of voice or
audio data to the TXA1/TXA2 output, typically to the
telephone line or, for the SP model, a speaker.
The RS56L-PCI modem provides the processing core for
a complete system design featuring data/fax modem,
voice/TAM, cellular phone, and speakerphone support,
depending on specific model (Table 1).
Note:
The term, “SoftK56”, refers to the family of RS56
modem models listed in Table 1.
Modem operation, including dialing, call progress,
telephone line interface, cell phone interface, and host
interface functions are supported and controlled through
the command set.
The modem hardware connects to the host processor via
a PCI bus interface. The OEM adds a crystal circuit,
EEPROM, telephone line interface, cellular phone
interface, and audio interface, as required and supported
by the modem model to complete the system.
Host Modem Software
The host modem software performs two distinct tasks:
1.
General modem control, which includes command
sets, fax Class 1, voice/TAM, speakerphone, error
correction, data compression, VoiceView, cell phone
drivers, and operating system interface functions.
Modem data pump signal processing, which includes
data and facsimile modulation and demodulation, as
well as voice sample formatting.
2.
2.
3.
Configurations of the modem software are provided to
support modem models listed in Table 1.
Binary executable modem software is provided for the
OEM.
Data/Fax Modes
As a V.90/K56flex data modem, the modem can receive
data from a digital source using a V.90- or K56flex-
compatible central site modem over the digital telephone
network portion of the PSTN at line speeds up to 56 kbps.
Asymmetrical data transmission supports sending data up
to V.34 rates. This mode can fallback to full-duplex V.34
mode, and to lower rates as dictated by line conditions.
As a V.34 data modem, 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 33600 bps down to 2400 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 modes and can support Group 3
facsimile send and receive speeds of 14400, 12000,
9600, 7200, 4800, or 2400 bps. Fax data transmission
and reception performed by the modem are controlled and
monitored through the fax EIA/IA-578 Class 1 and T.31
Speakerphone Mode (SP Model)
The SP model includes additional external microphone
and speaker interfaces which support voice and full-
duplex speakerphone (FDSP) operation.
Hands-free full-duplex telephone operation is supported in
Speakerphone Mode under host control. Speakerphone
Mode features an advanced proprietary speakerphone
algorithm which supports full-duplex voice conversation
with 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 host can
separately control volume, muting, and AGC in
microphone and speaker channels.
Cellular Phone Support
Cellular phone operation is supported by a generic
hardware interface meeting multiple standards and host
software specific to a particular phone type.
Development of software for specific phones is supported
by a software developer's kit. This kit allows for
straightforward porting of analog and digital cellular phone
drivers to the modem. Consult software release notes for
the latest supported types and models.
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Hardware Interface Signals
Bus Interface and Codec (BIC) Interface
The BIC (R6794) major functional interface signals are
shown in Figure 2.
The BIC (R6794) 144-pin TQFP hardware interface
signals are shown in Figure 3.
The BIC (R6794) 144-pin TQFP pin signal assignments
are shown in Figure 4.
Cellular Interface Signals
The I/O signals assigned to the cellular phone interface
depending upon phone type are listed in Table 2.
GPIO Pins
The default GPIO signal assignments are listed in Table
3. These assignments are configured by the .INF file.
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Package Dimensions
The package dimensions for the 144-pin TQFP are shown
in Figure 5.
Electrical and Environmental Specifications
The current and power requirements are listed in Table 4.
The absolute maximum ratings are listed in Table 5.
Additional Information
Additional information is described in the RS56L-PCI
Modem Designer’s Guide (Order No. 1202) and in the
Command Reference Manual (Order No. 1118).
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