GENERAL DESCRIPTION

The ADMC(F)341 is a low cost, single-chip, DSP-based controller suitable for permanent magnet synchronous motors, ac induction motors, and brushless dc motors. The ADMC(F)341 integrates a 20 MHz, fixed-point DSP core with a complete set of motor control and system peripherals that permits fast, efficient development of motor controllers.

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 x 16-Bit Data Memory RAM

512 x 24-Bit Program Memory RAM

4K x 24-Bit Program Memory ROM

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

3 Independent Flash Memory Sectors

3584 x 24-Bit, 256 x 24-Bit, 256 x 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