GENERAL DESCRIPTION The ADSP-21mod980N is a multi-port Internet gateway processor optimized for implementation of a complete V.34/V.90 digital modem. All datapump and controller functions can be implemented on a single device, offering the lowest power consumption and highest possible modem port density. The ADSP-21mod980N combines the ADSP-2100 Family base architecture (three computational units, data address generators, and a program sequencer) with two serial ports, a 16-bit internal DMA port, a byte DMA port, a programmable timer, Flag I/O, extensive interrupt capabilities, and on-chip program and data memory. PERFORMANCE FEATURES Complete Single Device Multi-Port Internet Gateway Processor (No External Memory Required) Implements Sixteen Modem Channels or Forty Voice Channels in One Package Each DSP Can Implement two V.34/V.90 Data/Fax Modem Channels (includes Datapump and Controller) Low Power Version: 640 MIPS Sustained Performance, 12.5 ns Instruction Time @ 1.9 Volts nominal (internal) Open Architecture Extensible to Voice-over-Network (VoN) and Other Applications Low Power Dissipation, 25 mW (typical) per Channel Powerdown Mode Featuring Low CMOS Standby Power Dissipation INTEGRATION FEATURES ADSP-2100 Family Code-Compatible, with Instruction Set Extensions 16 Mbits of On-Chip SRAM, Configured as 9 Mbits of Program Memory and 7 Mbits of Data Memory Dual-Purpose Program Memory, for Both Instruction and Data Storage 352-Ball PBGA with a 35mm x 35mm footprint SYSTEM CONFIGURATION FEATURES 16-Bit Internal DMA Port for High-Speed Access to On-Chip Memory (Mode-Selectable) Programmable Multichannel Serial Port Supports 24/32 Channels Two Double-Buffered Serial Ports with Companding Hardware and Automatic Data Buffering Separate Reset Pins for Each Internal Processor
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