ADSP21MOD870-000
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ADSP21MOD870-000

Product Category: IC Chips
Manufacturer: ADI
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  datasheetADSP21MOD870-000 Datasheet
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Manufacturer: ADI
Product Category: IC Chips
Features, Applications

Features, Applications

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 (30 kbps-56 kbps) (30 kbps-56 kbps) ITU-T 33600 Bits/s-2400 Bits/s CCITT 14400 Bits/s-7200 Bits/s CCITT V.32: 9600 Bits/s, 4800 Bits/s CCITT V.23 CCITT 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 5 ms High Speed 16-Bit Port Link Bus Provides Simple Interface Between Host and Modem Pool


The is a six-channel solution intended for remote access server and remote access concentrator applications. 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 number of data modulations, such V.34, 56 kbps 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.


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.


The 16-bit internal DMA port (DMA Port) provides transparent, direct access to the on-chip RAM of the ADSP-21mod970-110 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 ADSP21mod970-110 with software.


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 c Analog Devices, Inc., 1999


ADSP-21mod970 FUNCTIONS V.34/56k MODEM DTMF DIALING V.17 FAX CALLER V.42bis, MNP2-5 HDLC PROTOCOL

HOST FUNCTIONS MULTI-DSP CONTROL, OVERLAY MANAGEMENT AND DATA TRANSFERS

SERIAL PORTS Parallel Telco PCM Data Stream Architecture

The ADSP-21mod970-110 processor incorporates two complete synchronous, double-buffered serial ports for serial communications. The serial ports interface directly to a time-division multiplexed (TDM) 1544 kbps or 2048 kbps (E1) serial stream, an 8K sample/s data stream, an 8-bit companded (64 kb/s) data stream (DS0). The serial ports operate under modem software control.


The parallel Telco PCM data stream architecture, shown in Figure 3, provides a single bus interface for all data and control. In this architecture, the modem pool may have a remote Telco interface that provides a parallel data stream of Telco PCM data to the DSP through the DSP's DMA Port. An arbitrary number of DSPs can be connected, through the DMA Port, to a Host that provides the parallel data stream. Note: The number of parallel DSPs is limited only by the software loading constraints on the Host.


The ADSP-21mod970-110 Multiport Internet Gateway Processor supports two system architectures: serial Telco PCM TDM data stream and parallel Telco PCM data stream. The two architectures are differentiated by the method of proving Telco PCM data to the DSP Modem.


The serial Telco PCM TDM data stream architecture, shown in Figure 2, is the most common architecture. In this architecture, the modem pool may have a local Telco interface that provides a serial TDM data stream of Telco PCM data to the DSP through the DSP's Serial Port. You can connect to 24/32 DSPs, through the Serial Port, a 24-/32-channel serial TDM data stream.


Figure 3. Parallel Telco PCM Data Stream Architecture

Figure 2. Serial Telco PCM TDM Data Stream Architecture

Analog Devices provides sample C code for the software interface to the ADSP-21mod970-110. The software interface encompasses the following four areas--download, control interface, data interface and modem statistics.


The DMA Port on the ADSP-21mod970-110 contains an autoincrementing address generator. The host writes the starting address of the transfer and then writes the first word of data. After the first write, the DMA address generator automatically increments; the host writes the next data word and the DMA transfers that word to the next location in ADSP-21mod970110 memory. The executable image contains code and data that must be loaded into program and data memory. Program memory on the is 24 bits wide, therefore two transfers are used to load each word of program memory. The host begins the download by asserting the RESET pin of the ADSP-21mod970-110. The host then transfers all code and data. All internal memory can be loaded in 5 ms.


The ADSP-21mod970-110 is controlled through two FIFOs in DSP memory. The host sends a control event by writing to the host-to-modem FIFO. The ADSP-21mod970-110 posts events to the host by writing into the modem-to-host FIFO.


All data transferred to and from the ADSP-21mod970-110 passes through word FIFOs located in internal memory on the ADSP-21mod970-110. The FIFOs are accessed through a control structure that contains a pointer to the start of the FIFO in memory, the length of the FIFO in 16-bit words, a pointer to the next address to be read, and a pointer to the next address to be written. The transmit and receive FIFOs are 1024 bytes deep. Example code providing primitives for accessing the byteFIFOs is available from Analog Devices. Table I shows an example of a data FIFO.


Several modem statistics can be gathered through the DMA Port. These statistics include call status, modulation in use, connect rate, transmit and receive data rate, symbol rate, retrain count, rate renegotiation count and others. Table II and Table IV contain a complete listing of available modem statistics.


The modem is configured by programming various parameters through the DMA Port. Table III and Table V contain complete lists of modem configuration parameters.


Function Product Number Application Version Application Type Programmable Flag Data

Function Serial Port Tx Time Slot Serial Port Rx Time Slot Serial Port Configuration Programmable Flag Control Programmable Flag Data Host Interrupt Count

Search Part number : "ADSP2" Included word is 15
Part Number Manufacturer Package Quantity Description
ADSP21061LKS-160 ADI QFP 546
ADSP21062LKB-160 ADI BGA225 125
ADSP2171KS-133 ADI QFP 602
ADSP2181KS-133 ADI TQFP 25908
ADSP2186MKST-300 ADI 119
ADSP2185MKST-300 ADI QFP 493
ADSP2181KS-133-4.0 ADI 89
ADSP21266-SKSTZ-2B ADI BGA 75
ADSP21060LCW-160 ADI 240-BFCQFP Exposed Pad 535 IC DSP CONTROLLER 32BIT 240CQFP
ADSP21061LKSZ-160 ADI 240-BFQFP Exposed Pad 94 IC DSP CONTROLLER 1MBIT 240MQFP
ADSP2101KP-100 ADI PLCC 2260
ADSP2105KP55 ADI PLCC68 536
ADSP21065LKS-240 ADI QFP 978
ADSP2171KST-133 ADI QFP-128 95
ADSP2101KP40 ADI PLCC68 120
ADSP21MOD870-000 RELATED PRODUCT PICTURE
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  • ADSP2171KS-133
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  • ADSP2101KP-100
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