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| a Internet Gateway Processor Software ADSP-21mod870-110 INTRODUCTION FEATURES ISDN B-Channel HDLC DATA Modulations CCITT V.90 (30k-56k) K56FlexTM (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 The ADSP-21mod870-110 is a complete single chip. All datapump 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 consumption 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 performance DSP core, large on-chip SRAM, TDM serials 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 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 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 ADSP21mod870 with software through the 16-bit DMA interface. DMA INTERFACE The 16-bit internal DMA port (IDMA port) provides transparent, 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 ADSP21mod870 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 (c) Analog Devices, Inc., 1999 ADSP-21mod870-110 IDMA ADSP21mod870 SP0 T1, E1, PRI, xDSL, ATM LINE INTERFACE CALL CONTROL IDMA ADSP21mod870 SP0 IDMA ADSP21mod870 SP0 IDMA ADSP21mod870 SP0 IDMA ADSP21mod870 SP0 IDMA ADSP21mod870 SP0 IDMA ADSP21mod870 SP0 IDMA ADSP21mod870 SP0 HOST (ADSP-2183) PORT LINK BUS LAN OR INTERNET ADSP-21mod870 FUNCTIONS V.34/56k MODEM V.17 FAX V.42, V.42bis, MNP2-5 DTMF DIALING CALLER ID HDLC PROTOCOL HOST FUNCTIONS MULTI-DSP CONTROL, OVERLAY MANAGEMENT AND DATA TRANSFERS Figure 1. ADSP-21mod870 Network Access System SERIAL PORTS Parallel Telco PCM Data Stream Architecture The ADSP-21mod870 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 (T1) or 2048 kbps (E1) serial stream, to an 8K sample/s data stream, or to an 8-bit companded (64 kb/s) data stream (DS0). The serial ports operate under modem software control. SUPPORTED SYSTEM ARCHITECTURES 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. MEMORY I/F DMA PORT ADSP21mod870 The ADSP-21mod870-110 Internet Gateway Processor Software 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. Serial Telco PCM TDM Data Stream Architecture 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 up to 24/32 DSPs, through the Serial Port, to a 24/32 channel serial TDM data stream. MEMORY I/F DMA PORT ADSP21mod870 SERIAL PORT ADSP21mod870 HOST ADSP21mod870 ADSP21mod870 TELCO PCM I/F Figure 3. Parallel Telco PCM Data Stream Architecture ADSP21mod870 HOST ADSP21mod870 TELCO PCM I/F ADSP21mod870 Figure 2. Serial Telco PCM TDM Data Stream Architecture -2- REV. 0 ADSP-21mod870-110 SOFTWARE INTERFACE Modem Statistics Analog Devices provides sample C code for the software interface to the ADSP-21mod870-110. The software interface encompasses the following four areas--download, control interface, data interface and modem statistics. Download Several modem statistics can be gathered through the IDMA 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. Modem Configuration The IDMA port on the ADSP-21mod870-110 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 IDMA address generator automatically increments; the host writes the next data word and the IDMA transfers that word to the next location in ADSP21mod870-110 memory. The executable image contains code and data that must be loaded into program and data memory. Program memory on the ADSP-21mod870-110 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-21mod870-110. The host then transfers all code and data. All internal memory can be loaded in 5 ms. Control Interface The modem is configured by programming various parameters through the IDMA port. Table III and Table V contain complete lists of modem configuration parameters. Table II. Shell Status Reference # SS. 0 SS. 1 SS. 2 SS. 3 Function Product Number Application Version Application Type Programmable Flag Data Table III. Shell Parameters The ADSP-21mod870-110 is controlled through two FIFOs in DSP memory. The host sends a control event by writing to the host-to-modem FIFO. The ADSP-21mod870-110 posts events to the host by writing into the modem-to-host FIFO. Data Interface Reference # SP. 0 SP. 1 SP. 2 SP. 3 SP. 4 SP. 5 Function Serial Port Tx Time Slot Serial Port Rx Time Slot Serial Port Configuration Programmable Flag Control Programmable Flag Data Host Interrupt Count All data transferred to and from the ADSP-21mod870-110 passes through word FIFOs located in internal memory on the ADSP-21mod870. 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 byte-FIFOs is available from Analog Devices. Table I shows an example of a data FIFO. Table I. FIFO Example BASE RD_ptr INFO INFO INFO INFO WR_ptr BASE + SIZE REV. 0 -3- ADSP-21mod870-110 Table IV. Modem Status Table V. Modem Parameters Reference # Function MS. 0 MS. 1 MS. 2 MS. 3 MS. 4 MS. 5 MS. 6 MS. 7 MS. 8 MS. 9 MS. 10 MS. 11 MS. 12 MS. 13 MS. 14 MS. 15 MS. 16 MS. 17 MS. 18 MS. 19 MS. 20 MS. 21 MS. 22 MS. 23 MS. 24 MS. 25 MS. 26 MS. 27 MS. 28 MS. 29 MS. 30 MS. 31 MS. 32 MS. 33 MS. 34 MS. 35 MS. 36 MS. 37 MS. 38 MS. 39 MS. 40 MS. 41 MS. 42 MS. 43 MS. 44 MS. 45 MS. 46 MS. 47 MS. 48 Data Modulation State SNR MSE Measure Rx Level dBm Tx Level dBm Tx V.34 Symbol Rate Rx V.34 Symbol Rate Round Trip Delay Telemetry Data Update Constellation X Constellation Y Variable 2 X Pointer Variable 2 Y Pointer Variable 3 X Pointer Variable 3 Y Pointer Variable 4 X Pointer Variable 4 Y Pointer Data Modulation Monitor Retrain Local Count Data Modulation Monitor Retrain Remote Count Data Modulation Monitor Retrain Auto Count Data Modulation Monitor Renegotiate Local Count Data Modulation Monitor Renegotiate Remote Count Data Modulation Monitor Renegotiate Auto Count Omc Carrier Family Omc Disconnect Reason Omc State Omc Time Omc Idle Time Start Omc Data Protocol Time Start Omc Initial Rx Data Rate Omc Current Rx Data Rate Omc Initial Tx Data Rate Omc Current Tx Data Rate Data Protocol Data Protocol Compression Data Protocol Rx HDLC Error Frame Count Data Protocol Rx HDLC Frame Count Data Protocol Tx HDLC Frame Count Data Protocol Tx Data Frame Count Data Protocol Tx Data Frame Retransmit Count Data Protocol Rx Data Frame Count Data Protocol Rx Data Frame Missing Count Data Modulation Monitor Retrain Remote Count Data Protocol Call Tx Data Compressibility Metric Data Protocol Call Rx Data Compressibility Metric Data Protocol Call Tx Data Metric Data Protocol Call Rx Data Metric V.PCM Digital Attenuation V.PCM Robbed Bit Mask V.PCM Coding Law Reference # Function MP. 0 MP. 1 MP. 2 MP. 3 MP. 4 MP. 5 MP. 6 MP. 7 MP. 8 MP. 9 MP. 10 MP. 11 MP. 12 MP. 13 MP. 14 MP. 15 MP. 16 MP. 17 MP. 18 MP. 19 MP. 20 MP. 21 MP. 22 MP. 23 MP. 24 MP. 25 MP. 26 MP. 27 MP. 28 MP. 29 MP. 30 MP. 31 MP. 32 MP. 33 MP. 34 MP. 35 MP. 36 MP. 37 MP. 38 MP. 39 Omc Data Modulation Originate Enable Dial Billing Delay Duration Omc Data Modulation/Data Protocol Maximum Start-Up Duration Data Protocol Start Delay Data Protocol Allowed Mask Data Protocol Preferred Mask Data Protocol Auto-Select Mask Data Protocol Compression Mask Data Protocol Cmn Binary Enable Data Protocol Cmn HDLC Enable Data Protocol LAPM to Sync Data Protocol MNP Block Mode Enable Data Protocol MNP Data Compression Select Data Protocol MNP Header Optimize Enable Data Protocol MNP Maximum Data Size Data Protocol MNP Service Class Data Protocol Disconnect Management Mode Data Protocol Disconnect Management Duration Digital Data Modes Pump Data Modes Pump Tone Transmit Level Pump Transmit Level Pump V.34 Transmit Level Data Modulation Carrier Detect Duration Data Modulation Carrier Loss Disconnect Timer Duration Data Modulation Line Quality Monitor Mode Data Modulation Options Mask Data Modulation V.32 Rate Enable Mask Data Modulation V.34 Data Rate Mask V.PCM Maximum Power V.PCM Reference Point K56 RBS Maximum K56 Tx Data Rate Maximum K56 Tx Data Rate Minimum DTE Interface Big Endian PPP Rx Mode Enable PPP Tx Mode Enable fP PPP Detect Enable fP PPP Rx ACCM fP PPP Tx ACCM -4- REV. 0 ADSP-21mod870-110 ORDERING GUIDE Part Number ADSP-21mod870-110 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 -5- ADSP-21mod870-110 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 100-Lead Metric Thin Plastic Quad Flatpack (LQFP) (ST-100) C3469-2-2/99 76 75 51 50 0.640 (16.25) 0.630 (16.00) TYP SQ 0.620 (15.75) 0.555 (14.10) 0.551 (14.00) TYP SQ 0.547 (13.90) 100 1 0.063 (1.60) MAX 0.030 (0.75) 0.024 (0.60) TYP 0.020 (0.50) SEATING PLANE 12 TYP TOP VIEW (PINS DOWN) 0.004 (0.102) MAX LEAD COPLANARITY 0 -7 25 6 4 26 0.007 (0.177) 0.005 (0.127) TYP 0.003 (0.077) 0.020 (0.50) BSC LEAD PITCH 0.011 (0.27) 0.009 (0.22) TYP 0.007 (0.17) LEAD WIDTH NOTE: THE ACTUAL POSITION OF EACH LEAD IS WITHIN 0.0032 (0.08) FROM ITS IDEAL POSITION WHEN MEASURED IN THE LATERAL DIRECTION. CENTER FIGURES ARE TYPICAL UNLESS OTHERWISE NOTED. -6- REV. 0 PRINTED IN U.S.A. |
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