GENERAL DESCRIPTION
The ADMCF326 is a low cost, single-chip DSP-based controller, suitable for permanent magnet synchronous motors, ac induction motors, and brushless dc motors. The ADMCF326 integrates a 20 MIPS, fixed-point DSP core with a complete set of motor control and system peripherals that permits fast, efficient devel opment of motor controllers.

FEATURES
20 MIPS Fixed-Point DSP Core
  Single Cycle Instruction Execution (50 ns)
  ADSP-21xx Family Code Compatible
  Independent Computational Units
    ALU
    Multiplier/Accumulator
    Barrel Shifter
  Multifunction Instructions
  Single Cycle Context Switch
  Powerful Program Sequencer
    Zero Overhead Looping
    Conditional Instruction Execution
  Two Independent Data Address Generators
Memory Configuration
  512
24-Bit Program Memory RAM
  512
16-Bit Data Memory RAM
  4K
24-Bit Program Memory ROM
  4K
24-Bit Program Flash Memory
    Three Independent Programmable Sectors
    Security Lock Bit
    10K Erase/Program Cycles
Three-Phase 16-Bit PWM Generator
  16-Bit Center-Based PWM Generator
  Programmable Dead Time and Narrow Pulse Deletion
  Edge Resolution to 50 ns
  150 Hz Minimum Switching Frequency
  Double/Single Duty Cycle Update Mode Control
  Programmable PWM Pulsewidth
  Special Crossover Function for Brushless DC Motors
  Individual Enable and Disable for Each PWM Output
  High Frequency Chopping Mode for Transformer
    Coupled Gate Drives
  External PWMTRIP Pin
Integrated ADC Subsystem
  Six Analog Inputs
  Acquisition Synchronized to PWM Switching Frequency
  Internal Voltage Reference
9-Pin Digital I/O Port
  Bit Configurable as Input or Output
  Change of State Interrupt Support
Two 8-Bit Auxiliary PWM Timers
  Synthesized Analog Output
  Programmable Frequency
  0% to 100% Duty Cycle
  Two Programmable Operational Modes
    Independent Mode/Offset Mode
16-Bit Watchdog Timer
Programmable 16-Bit Internal Timer with Prescaler
Double Buffered Synchronous Serial Port
Hardware Support for UART Emulation
Integrated Power-On Reset Function Options
28-Lead SOIC and PDIP Packages Available

TARGET APPLICATIONS
Washing Machines, Refrigerator Compressors, Fans, Pumps, Industrial Variable Speed Drives

MOTOR TYPES
AC Induction Motors
Permanent Magnet Synchronous Motors (PMSM)
Brushless DC Motors (BDCM)