ADSP-2185 Analog Devices, ADSP-2185 Datasheet

ADSP-2185

Manufacturer Part Number

ADSP-2185

Description

DSP Microcomputer

Manufacturer

Analog Devices

Datasheet

1.ADSP-2185.pdf (32 pages)

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*ICE-Port is a trademark of Analog Devices, Inc.

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.

FEATURES

PERFORMANCE

30 ns Instruction Cycle Time 33 MIPS Sustained

Single-Cycle Instruction Execution

Single-Cycle Context Switch

3-Bus Architecture Allows Dual Operand Fetches in

Multifunction Instructions

Power-Down Mode Featuring Low CMOS Standby

Low Power Dissipation in Idle Mode

INTEGRATION

ADSP-2100 Family Code Compatible, with Instruction

80K Bytes of On-Chip RAM, Configured as

Dual Purpose Program Memory for Both Instruction

Independent ALU, Multiplier/Accumulator and Barrel

Two Independent Data Address Generators

Powerful Program Sequencer Provides

Programmable 16-Bit Interval Timer with Prescaler

100-Lead TQFP

SYSTEM INTERFACE

16-Bit Internal DMA Port for High Speed Access to

4 MByte Byte Memory Interface for Storage of Data

8-Bit DMA to Byte Memory for Transparent Program

I/O Memory Interface with 2048 Locations Supports

Programmable Memory Strobe & Separate I/O Memory

Programmable Wait State Generation

Two Double-Buffered Serial Ports with Companding

Automatic Booting of On-Chip Program Memory from

Performance

Every Instruction Cycle

Power Dissipation with 100 Cycle Recovery from

Power-Down Condition

Set Extensions

16K Words On-Chip Program Memory RAM and

16K Words On-Chip Data Memory RAM

and Data Storage

Shifter Computational Units

Zero Overhead Looping Conditional Instruction

Execution

On-Chip Memory (Mode Selectable)

Tables & Program Overlays

and Data Memory Transfers (Mode Selectable)

Parallel Peripherals (Mode Selectable)

Space Permits “Glueless” System Design

(Mode Selectable)

Hardware and Automatic Data Buffering

Byte-Wide External Memory, e.g., EPROM, or

Through Internal DMA Port

GENERAL NOTE

This data sheet represents production grade specifications for

the ADSP-2185 (5 V).

GENERAL DESCRIPTION

The ADSP-2185 is a single-chip microcomputer optimized for

digital signal processing (DSP) and other high speed numeric

processing applications.

The ADSP-2185 combines the ADSP-2100 family base archi-

tecture (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.

The ADSP-2185 integrates 80K bytes of on-chip memory con-

figured as 16K words (24-bit) of program RAM and 16K words

(16-bit) of data RAM. Power-down circuitry is also provided to

meet the low power needs of battery operated portable equip-

ment. The ADSP-2185 is available in 100-pin TQFP package.

In addition, the ADSP-2185 supports new instructions, which

include bit manipulations—bit set, bit clear, bit toggle, bit test—

new ALU constants, new multiplication instruction (x squared),

biased rounding, result free ALU operations, I/O memory trans-

fers and global interrupt masking, for increased flexibility.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

DATA ADDRESS

GENERATORS

DAG 1

Six External Interrupts

13 Programmable Flag Pins Provide Flexible System

UART Emulation through Software SPORT Reconfiguration

ICE-Port™* Emulator Interface Supports Debugging

ALU

ARITHMETIC UNITS

ADSP-2100 BASE

Signaling

in Final Systems

ARCHITECTURE

DAG 2

MAC

SHIFTER

SEQUENCER

PROGRAM

FUNCTIONAL BLOCK DIAGRAM

PROGRAM MEMORY ADDRESS

DATA MEMORY ADDRESS

PROGRAM MEMORY DATA

DATA MEMORY DATA

World Wide Web Site: http://www.analog.com

PROGRAM

DSP Microcomputer

MEMORY

SPORT 0

16k

SERIAL PORTS

POWER-DOWN

MEMORY

CONTROL

SPORT 1

MEMORY

16k

DATA

ADSP-2185

PROGRAMMABLE

TIMER

FLAGS

AND

I/O

FULL MEMORY

CONTROLLER

EXTERNAL

INTERNAL

HOST MODE

ADDRESS

BYTE DMA

DATA

PORT

DATA

DMA

BUS

MODE

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