The ADSP-21mod870 is a single-chip Internet gateway pro-cessor optimized for implementation of a complete V.34/56K modem. All data pump and controller functions can be imple-mented on a single chip, offering the lowest power consumption and highest possible modem port density.
The ADSP-21mod870, shown in the Functional Block Dia-gram, 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.
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Complete Single-Chip Internet Gateway Processor (No External Memory Required)Implements V.34/V.90 Data/FAX Modem Including Controller and Datapump19 ns Instruction Cycle Time @ 3.3 V, 52 MIPS Sustained PerformanceOpen Architecture Platform Extensible to Voice Over IP and Other ApplicationsLow Power Dissipation, 80 mW (Typical) for Digital ModemPower-Down Mode Featuring Low CMOS StandbyPower Dissipation
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Supply Voltage . . . . . . . . . . . . . . . . . .. . . . . . 0.3 V to +4.6 V
Input Voltage . . . . . . . . . . . . . . . . . . . . 0.5 V to VDD + 0.5 V
Output Voltage Swing . . . . . . . . . . . .. .0.5 V to VDD + 0.5 V
Operating Temperature Range (Ambient) . .40°C to +85°C
Storage Temperature Range . . . . . . . . . . 65°C to +150°C
Lead Temperature (5 sec) LQFP . . . . . . . . . . . . . . . . . +280°C
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