ADMC331BST datasheet(7/36 Pages) AD

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ADMC331

–7–

REV. B

(Continued from page 1)

Two Programmable Operational Modes

Independent Mode

Offset Mode

16-Bit Watchdog Timer

Programmable 16-Bit Internal Timer with Prescaler

Two Double Buffered Synchronous Serial Ports

Four Boot Load Protocols via SPORT1

E2PROM/SROM Booting

UART Booting (SCI Compatible) with Autobaud

Feature

Synchronous Master Booting with Autobaud Feature

Synchronous Slave Booting with Autobaud Feature

Debugger Interface via SPORT1 with Autobaud (UART

and Synchronous Supported)

ROM Utilities

Full Debugger for Program Development

Preprogrammed Math Functions

Preprogrammed Motor Control Functions—Vector

Transformations

80-Lead TQFP Package

Industrial Temperature Range –40 C to +85 C

GENERAL DESCRIPTION

The ADMC331 is a low cost, single-chip DSP-based controller,

suitable for ac induction motors, permanent magnet synchro-

nous motors, brushless dc motors, and switched reluctance

motors. The ADMC331 integrates a 26 MIPS, fixed-point DSP

core with a complete set of motor control peripherals that per-

mits fast, efficient development of motor controllers.

The DSP core of the ADMC331 is the ADSP-2171, which is

completely code compatible with the ADSP-2100 DSP family

and combines three computational units, data address genera-

tors and a program sequencer. The computational units com-

prise an ALU, a multiplier/accumulator (MAC) and a barrel

shifter. The ADSP-2171 adds new instructions for bit manipula-

tion, multiplication (X squared), biased rounding and global

interrupt masking. In addition, two flexible, double-buffered,

bidirectional, synchronous serial ports are included in the

ADMC331.

The ADMC331 provides 2K

× 24-bit program memory RAM,

× 24-bit program memory ROM and 1K × 16-bit data

memory RAM. The program and data memory RAM can be

boot loaded through the serial port from a Serial ROM (SROM),

2PROM, asynchronous (UART) connection or synchronous

connection. The program memory ROM includes a monitor

that adds software debugging features through the serial port. In

addition, a number of preprogrammed mathematical and motor

control functions are included in the program memory ROM.

The motor control peripherals of the ADMC331 include a

16-bit center-based PWM generation unit that can be used to

produce high accuracy PWM signals with minimal processor

overhead and seven analog input channels. The device also

contains two auxiliary 8-bit PWM channels, a 16-bit watch-

dog timer and expanded capability through the serial ports

and 24-bit digital I/O ports.

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