admc331 Analog Devices, Inc., admc331 Datasheet - Page 7

• Manufacturer Part Number: admc331
• Description: Single Chip Dsp Motor Controller
• Manufacturer: Analog Devices, Inc.

ADMC331
(Continued from page 1)
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,
2K × 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),
2
E
PROM, 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.