ADSP-21MOD970-110 Datasheet, PDF (1/6 Pages) Analog Devices – Multiport Internet Gateway Processor Solution

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FEATURES
High Density
Implements Six Modem Channels in One Package
304-Ball PBGA with a 1.45 Square Inch (961 sq. mm.)
Footprint
ISDN B-Channel HDLC
DATA Modulations
CCITT V.90 (30 kbps–56 kbps)
K56Flex™ (30 kbps–56 kbps)
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 per Channel Typical Active
Low Power and Sleep Modes
On-Chip DS0/DS1 Interface
Full Function DMA Port
No External Memory Required
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
Multiport Internet
Gateway Processor Solution
ADSP-21mod970-110
INTRODUCTION
The ADSP-21mod970-110 is a six-channel solution intended
for remote access server and remote access concentrator applica-
tions. It combines a highly integrated DSP processor with
downloadable software. All datapump and controller functions
are implemented on a single 1.45-square-inch chip. This modem
package allows the highest modem port density while achieving
the lowest power consumption in a software upgradable platform.
The ADSP-21mod970-110 is designed for high-density systems
such as remote access servers, see Figure 1. Its high performance
DSP core, large on-chip SRAM, TDM serial port and 16-bit
DMA port provide efficient control and data communication
with minimal chip count. The modem software provides a num-
ber of data modulations, such as V.34, 56 kbps PCM and ISDN
with a software upgrade path to future standards and new appli-
cations, 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-21mod970-110 processor integrates 960K bytes
of on-chip memory. The modem datapump and controller
software, 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-21mod970-110 with software through the 16-bit DMA
interface.
DMA INTERFACE
The 16-bit internal DMA port (DMA Port) provides transpar-
ent, direct access to the on-chip RAM of the ADSP-21mod970-110
processor. This high speed access to on-chip memory simpli-
fies control and data communication and system debug. Use the
16-bit DMA interface to dynamically configure the ADSP-
21mod970-110 with software.
K56Flex is a trademark of Rockwell International and Lucent Technologies.
REV. 0
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