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PDF ADSP-21MOD870-110 Data sheet ( Hoja de datos )
| Número de pieza | ADSP-21MOD870-110 | |
| Descripción | Internet Gateway Processor Software | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Internet Gateway Processor Software
ADSP-21mod870-110
FEATURES
ISDN B-Channel HDLC
DATA Modulations
CCITT V.90 (30k–56k)
K56Flex™ (30k–56k)
ITU-T V.34: 33600 Bits/s–2400 Bits/s
CCITT V.32bis: 14400 Bits/s–7200 Bits/s
CCITT V.32: 9600 Bits/s, 4800 Bits/s
CCITT V.23
CCITT V.22/V.22bis: 2400, 1200, 600 Bits/s
CCITT V.21: 300 Bits/s
Bell 212A: 1200 Bits/s
Bell 103: 300 Bits/s
Start-Up Procedures:
ITU-T V.8
Error Correction and Data Compression:
CCITT V.42 Error Correction (LAPM and MNP2-4)
CCITT V.42bis Data and MNP Class 5 Compression
FAX Modem
V.17/V.29/V.27ter/V.21 Channel 2
T.30 Protocol
V.120
V.110
PPP Asynchronous Framing Support (RFC 1662)
Low Power
80 mW Typical Active
Low Power and Sleep Modes
High Density
100-Lead LQFP Package
On-Chip DS0/DS1 Interface
Full Function DMA Port
No External Memory Required
0.4 Square Inch per Complete Modem Port
3.3 V Supply
Fully Upgradable RAM-Based Architecture
Fast Download
Full Image in 5 ms
High Speed 16-Bit Port Link Bus Provides Simple
Interface Between Host and Modem Pool
INTRODUCTION
The ADSP-21mod870-110 is a complete single chip. All data-
pump and controller functions are implemented on a single
0.4 square-inch chip. This modem package allows the highest
modem port density, while achieving the lowest power con-
sumption in a software upgradable platform.
The ADSP-21mod870-110 is designed for high density systems
such as remote access servers (see Figure 1). Its high perfor-
mance DSP core, large on-chip SRAM, TDM serials port and
16-bit DMA port provide efficient control and data communi-
cation with minimal chip count. The modem software provides
a number of data modulations, such as V.34, 56K bps PCM,
and ISDN with a software upgrade path to future standards,
and new applications, such as voice over network. The host
interface allows system access to modem statistics such as call
progress, connect speed and modulation parameters such as
retrain count and symbol rate.
ON-CHIP SRAM
The ADSP-21mod870-110 processor integrates 160K bytes of
on-chip memory. The modem datapump and controller soft-
ware, as well as data storage, are contained in the on-chip SRAM.
The SRAM cells are designed by Analog Devices. These cells
are optimized for high speed digital signal processing and low
power consumption. You can dynamically configure the ADSP-
21mod870 with software through the 16-bit DMA interface.
DMA INTERFACE
The 16-bit internal DMA port (IDMA port) provides transpar-
ent, direct access to the on-chip RAM of the ADSP-21mod870
processor. This high speed access to on-chip memory simplifies
control and data communication and system debug. Use the
16-bit DMA interface to dynamically configure the ADSP-
21mod870 with software.
K56Flex is a trademark of Rockwell International and Lucent Technologies.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements 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 or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999
1 page  
ADSP-21mod870-110
Part Number
ADSP-21mod870-110
ORDERING GUIDE
Description
52 MIPS DSP with Modem
Software Unit License
Instruction Rate MHz
52.0
Package Description
100-Lead LQFP
Package Option
ST-100
REV. 0
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