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ADMC341

DashDSP® 28-Lead Flash and ROM Memory, Mixed-Signal DSPs with Enhanced Analog Front End

Analog Devices 

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DashDSP® 28-Lead Flash and

ROM Memory, Mixed-Signal DSPs

with Enhanced Analog Front End

ADMC(F)341

FEATURES

20 MHz Fixed-Point DSP Core

Single-Cycle Instruction Execution (50 ns)

ADSP-21xx Family Code Compatibility

Independent Computational Units

ALU, Multiplier/Accumulator, Barrel Shifter

Multifunction Instructions

Single-Cycle Context Switch

Powerful Program Sequencer

Zero Overhead Looping

Conditional Instruction Execution

2 Independent Data Address Generators

Memory Configuration

512 ؋ 16-Bit Data Memory RAM

512 ؋ 24-Bit Program Memory RAM

4K ؋ 24-Bit Program Memory ROM

4K ؋ 24-Bit Program Flash Memory (ADMCF341 Only)

3 Independent Flash Memory Sectors

3584 ؋ 24-Bit, 256 ؋ 24-Bit, 256 ؋ 24-Bit

Low Cost, Pin Compatible ROM Option

16-Bit Watchdog Timer

Programmable 16-Bit Internal Timer with Prescaler

2 Double-Buffered Serial Ports with SPI Mode Support

Integrated Power-On Reset Function

3-Phase 16-Bit PWM Generation Unit:

16-Bit Center-Based PWM Generator

Programmable PWM Pulsewidth

Edge Resolution to 50 ns

153 Hz Minimum Switching Frequency

Double/Single Duty Cycle Update Mode Control

Individual Enable and Disable for Each PWM Output

High Frequency Chopping Mode for Transformer

Coupled Gate Drives

External PWMTRIP Pin

Integrated 6-Channel ADC Subsystem

3 Bipolar ISENSE Inputs with Programmable

Sample-and-Hold Amplifier and Overcurrent

Protection (Usable as 3 Dedicated Analog Inputs)

Muxed Auxiliary Analog Inputs

Internal Voltage Reference (2.5 V)

Acquisition Synchronized to PWM Switching

Frequency

9-Pin Digital I/O Port

Bit Configurable as Input or Output

Change of State Interrupt Support

2 16-Bit Auxiliary PWM Timers

Synthesized Analog Output

Programmable Frequency

0% to 100% Duty Cycle

2 Programmable Operational Modes

Independent Mode/Offset Mode

Motor Types

Permanent Magnet Synchronous Motors (PMSM)

Brushless DC Motors (BDCM)

AC Induction Motors (ACIM)

APPLICATIONS

Refrigerator and Air Conditioner Compressors

Washing Machines

Industrial Variable Speed Drives

HVAC

FUNCTIONAL BLOCK DIAGRAM

ADSP-21xx BASE

ARCHITECTURE

DATA

ADDRESS

GENERATORS

DAG 1 DAG 2

PROGRAM

SEQUENCER

MEMORY BLOCK

PROGRAM FLASH

OR ROM MEMORY

4k ؋ 24-BIT

PROGRAM MEMORY ADDRESS

DATA MEMORY ADDRESS

PROGRAM MEMORY DATA

DATA MEMORY DATA

MOTOR CONTROL PERIPHERALS

ADC SUBSYSTEM

3

VREF

2.5V

ANALOG

INPUTS

3

ISENSE AMP

AND TRIP

SHA

TIMERS

6

16-BIT

THREE-

PHASE

PWM

ARITHMETIC UNITS

ALU MAC SHIFTER

POR

TIMER

DSP is a registered trademark of Analog Devices, Inc.

REV. A

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 that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices.

SERIAL PORT

SPORT 0

SPORT 1

7

PIO

9

2 ؋ 16-BIT

AUX

PWM

2

WATCH-

DOG

TIMER

MULTIPLEXED ON EXTERNAL PINS

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

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© Analog Devices, Inc., 2002

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