Agere CSP1034C-T11 One-chip modem for embedded application Datasheet

Product Brief Rev 1.0
April 2005
OCM-22
One-Chip Modem for Embedded Applications
Features
■
■
■
■
■
■
■
■
■
■
■
■
Controller and data pump in a single 48-pin TQFP
with two integrated peripheral interfaces:
— Partial ISA (8-bit parallel).
— RS232.
Data mode capabilities range:
— V.22bis: 2400 bits/s.
— V.22: 1200 bits/s.
— V.23: 1200/600 bits/s.
— V.21: 300 bits/s.
— Bell 212A: 1200 bits/s.
— Bell 103: 300 bits/s.
Serial DTE interface:
— Hardware and software flow control.
— Asynchronous data format: 19,200 bits/s, 8-bit
data, no parity, 1 stop bit.
Parallel DTE interface for connection to system I/O
or memory bus.
Introduction
OCM-22 is a low-cost modem solution for low-speed
embedded applications. OCM22 includes a simplified
AT command set and supports data rates from
300 bits/s (V.21) to 2400 bits/s (V.22bis) and only
requires a CSP1034 or CSP1035A to make a complete modem.
OCM-22 provides a choice of two system interfaces,
a serial interface or an 8-bit parallel interface. The
serial interface can be used in systems that have an
available serial port. In other systems, the parallel
interface can be I/O or memory mapped onto typical
processor buses.
In typical applications, OCM-22 is paired with Agere's
CSP1035A silicon DAA to implement a low-cost
worldwide modem. OCM-22 can also be used with
Agere's CSP1034 line codec for traditional transformer-based DAA designs.
DAA support:
— CSP1035A silicon DAA.
— CSP1034C with transformer DAA.
Applications
Supports low-cost, call-progress speaker.
■
Set-top-box
Support for country-specific settings
(homologation) under host control.
■
Verification machines
■
Point of sale
■
Franking machines
■
Other low-speed data
Supports extension phone detection for set-top
box applications when used with CSP1035A DAA.
Customized feature set using code downloads into
on-chip RAM.
Internal PLL to generate high-speed clocks from
external low-cost crystal.
Single 3.3 V supply.
Type 1 caller ID support (US, UK, France, Germany, and Spain).
OCM-22
One-Chip Modem for Embedded Applications
Product Brief Rev 1.0
April 2005
Functional Description
The Agere Systems OCM-22 chip set is a two-chip solution consisting of an Agere Systems OCM-22 and a
CSP1034C or CSP1035A. A block diagram of the OCM-22 chip sets are illustrated in Figure 1 and Figure 2.
AGERE SYSTEMS
OCM-22 CONTROLLERLESS MODEM CHIP
U-DAA
OCM-22
SYSTEM
MICROPROCESSOR
CSP1035A (LINE-POWERED)
UNIVERSAL
DAA
LINE
CODEC
PARALLEL/
SERIAL
48-PIN
TQFP
REMAINING
COMPONENTS
FOR
U-DAA
TELEPHONE
LINE
48-PIN TQFP
D5-9559 (F)a R.02
Figure 1. OCM-22 + CSP1035A Universal DAA Chip Set Block Diagram
AGERE SYSTEMS
OCM-22 CONTROLLERLESS MODEM CHIP
OCM-22
SYSTEM
MICROPROCESSOR
SERIAL/
PARALLEL
48-PIN
TQFP
CSP1034C LINE
CODEC
STANDARD
DAA CIRCUIT
TELEPHONE
LINE
48-PIN TQFP
5-9560 (F)a R.02
Figure 2. OCM-22 + CSP1034C Chip Set Block Diagram
DIA Port
OCM-22 provides a system interface for use in embedded applications that requires only two address lines, a read/
write strobe, and a single chip select. The interface feeds directly into the DIAs four registers.
The following diagram shows how the host system and the OCM-22 interface. In this configuration, external logic
decodes the address that selects the DIA port, and the embedded application accesses the four control registers
associated with the DIA port to communicate with OCM-22. This configuration also allows a clean interface to
external plug-and-play and PCMCIA interface devices.
Agere Systems Inc.
2
OCM-22
One-Chip Modem for Embedded Applications
Product Brief Rev 1.0
April 2005
Functional Description (continued)
OCM-22 DEVICE
DATA[7:0]
ADDR[1:0]
READN
WRITEN
INTRPT
HD[7:0]
HA[1:0]
HRDN
HWRN
HINTR
ADDRESS
DECODE
HCSN
5-8104 (F) a
Figure 3. Parallel Interface to DIA Port
Internal PLL for Low-Speed Crystal Support
Power Requirements
OCM-22 supports low-speed, external crystals by
incorporating a PLL to support lower-cost crystals and
to ease the effort of minimizing EMI. If future code
needs higher clock rates, an internal multiplier can provide this without recertification or redesign of the external hardware. OCM-22 requires an external 29.4912
MHz crystal or oscillator.
Both the OCM-22 device and the CSP1034C are
manufactured in low-power CMOS technology and are
designed to operate using only a single 3.3 V supply.
During operation, OCM-22's on-chip PLL can be set to
provide only the minimum internal clock rate required.
PWM Speaker Interface
The speaker driver employs a pulse-width modulated
algorithm, where 8-bit two's complement data is modulated by a triangle wave. The following diagram shows
the recommended speaker configuration. This inexpensive configuration drives a low-impedance speaker
while obtaining a suitable volume. The SPKR signal is
fed to a transistor through a low-pass filter to remove
the carrier signal (cut-off frequency = 4 kHz).
The CSP1035A is also manufactured in low-power
CMOS technology. However, the CSP1035A is fully
line powered. A shunt regulator maintains a monitored
2.7 V supply, during off-hook conditions. If the voltage
falls below 2.2 V, the chip saves its registers and goes
into reset. This allows the CSP1035A to retain the register settings during a call bridge where the tip/ring voltage can collapse to 0 V for up to 400 ms and start up
again at the completion of the call break.
+3.3 V
AT-08
3.3 kΩ
FDV301N
SPKR
10 kΩ
6800 pF
5-8105 (F)
Figure 4. Lower-Impedance Speaker Configuration
Agere Systems Inc.
3
OCM-22
One-Chip Modem for Embedded Applications
Product Brief Rev 1.0
April 2005
Package Information
OCM22
CSP
1034C/
1035A
48-PIN
TQFP
48-PIN
TQFP
DIME
(U.S.A.)
TOP VIEW
OCM-22
CSP1034C/1035A
DIME
SIDE VIEW
Figure 5. OCM-22 Data Pump Chip Set
Ordering Information
Table 1. Chip Set Names and Part Numbers
Device
Description
OCM-22
3.3 V Codec
Silicon DAA
Modem
CSP1034C
CSP1035A
Package
48-pin TQFP
48-pin TQFP
48-pin TQFP
Part Number
OCM22-JTDKV-DB
CSP1034C-T11
CSP1035A-T11
Comcode
700054307
108159542
108877077
MNP is a registered trademark of Microcom, Inc.
IEEE is a registered trademark of the Institute of Electrical and Electronics Engineers, Inc.
For additional information, contact your Agere Systems Account Manager or the following:
INTERNET:
Home: http://www.agere.com Sales: http://www.agere.com/sales
E-MAIL:
[email protected]
N. AMERICA: Agere Systems Inc., Lehigh Valley Central Campus, Room 10A-301C, 1110 American Parkway NE, Allentown, PA 18109-9138
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610-712-4106)
ASIA:
CHINA: (86) 21-54614688 (Shanghai), (86) 755-25881122 (Shenzhen)
JAPAN: (81) 3-5421-1600 (Tokyo), KOREA: (82) 2-767-1850 (Seoul), SINGAPORE: (65) 6741-9855, TAIWAN: (886) 2-2725-5858 (Taipei)
EUROPE:
Tel. (44) 1344 296 400
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.
Agere, Agere Systems, and the Agere logo are registered trademarks of Agere Systems Inc.
Copyright © 2005 Agere Systems Inc.
All Rights Reserved
April 2005
PB03-202DMOD-1 (Replaces PB03-202DMOD)
Similar pages