ADSP-21MOD980N-000 查看數據表（PDF） - Analog Devices

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ADSP-21MOD980N-000

MultiPort Internet Gateway Processor

Analog Devices 

PRELIMINARY TECHNICAL DATA

ADSP-21mod980N For current information contact Analog Devices at (800) ANALOGD

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 program-

mable timer, Flag I/O, extensive interrupt capabilities, and

on-chip program and data memory.

The ADSP-21mod980N integrates 16 Mbits of on-chip

memory, configured as 384 Kwords (24-bit) of program

RAM, and 448 Kwords (16-bit) of data RAM. Power-down

circuitry is also provided to reduce the average and standby

power consumption of equipment which in turn reduces

equipment cooling requirements. The ADSP-21mod980N

is available in a 35 mm x 35 mm, 352-lead PBGA package.

Fabricated in a high-speed, low-power, CMOS process, the

ADSP-21mod980N operates with a 12.5 ns instruction

cycle time. Every instruction can execute in a single proces-

sor cycle.

The ADSP-21mod980N’s flexible architecture and com-

prehensive instruction set allow the processor to perform

multiple operations in parallel. In one processor cycle, the

ADSP-21mod980N can:

• Generate the next program address

• Fetch the next instruction

• Perform one or two data moves

• Update one or two data address pointers

• Perform a computational operation

This takes place while the processor continues to:

• Receive and transmit data through the two serial ports

• Receive and/or transmit data through the internal

DMA port

• Receive and/or transmit data through the byte DMA

port

• Decrement timer

MODEM SOFTWARE

The following software is available as object code from

Analog Devices Inc.

• ADSP-21mod Family Dynamic Internet Voice

AccessTM (DIVA) Voice Over Network Solution.

• ADSP-21mod980-210N Multiport Internet Gateway

Processor Modem Solution.

A complete system implementation requires the

ADSP-21mod980N device plus modem or voice software.

The modem software executes general modem control,

command sets, error correction, and data compression,

data modulations (for example, V.34 and V.90), and host

interface functions.The host interface allows system access

to modem statistics, such as call progress, connect speed,

retrain count, symbol rate, and other modulation

parameters.

The modem datapump and controller software reside in

on-chip SRAM and do not require additional memory. You

can configure the ADSP-21mod980N dynamically by

downloading software from the host through the 16-bit

IDMA interface. This SRAM-based architecture provides a

software upgrade path to other applications, such as

voice-over-IP, and to future standards.

DEVELOPMENT SYSTEM

Analog Devices' wide range of software and hardware devel-

opment tools supports the ADSP-218x N Series. The DSP

tools include an integrated development environment

(IDE), an evaluation kit, and a serial port emulator.

VisualDSP® is an integrated development environment,

allowing for fast and easy development, debug and deploy-

ment. The VisualDSP project management environment

lets programmers develop and debug an application. This

environment includes an easy-to-use assembler that is based

on an algebraic syntax; an archiver (librarian/library

builder); a linker; a loader; a cycle-accurate, instruc-

tion-level simulator; a C compiler; and a C run-time library

that includes DSP and mathematical functions.

Debugging both C and assembly programs with the Visu-

alDSP debugger, programmers can:

• View mixed C and assembly code (interleaved source and

object information)

• Insert break points

• Set conditional breakpoints on registers, memory, and

stacks

• Trace instruction execution

• Fill and dump memory

• Source level debugging

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6/2001 REV. PrB

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