a
Single Chip DSP
Motor Controller
ADMC331
TARGET APPLICATIONS
Washing Machines, Refrigerator Compressors, Fans,
Pumps, Industrial Variable Speed Drives
Edge Resolution to 38.5 ns
198 Hz Minimum Switching Frequency
Double/Single Duty Cycle Update Mode Control
Programmable PWM Pulsewidth
Suitable for AC Induction and Synchronous Motors
Special Signal Generation for Switched Reluctance
Motors
Special Crossover Function for Brushless DC Motors
Individual Enable and Disable for all PWM Outputs
High Frequency Chopping Mode for Transformer
Coupled Gate Drives
Hardwired Polarity Control
External PWMTRIP Pin
Seven Analog Input Channels
Acquisition Synchronized to PWM Switching
Frequency
Conversion Speed Control
24 Bits of Digital I/O Port
Bit Configurable as Input or Output
Change of State Interrupt Support
Two 8-Bit Auxiliary PWM Timers
Synchronized Analog Output
Programmable Frequency
0% to 100% Duty Cycle
FEATURES
26 MIPS Fixed-Point DSP Core
Single Cycle Instruction Execution (38.5 ns)
ADSP-2100 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 Generator
Memory Configuration
2K ؋ 24-Bit Program Memory RAM
2K ؋ 24-Bit Program Memory ROM
1K ؋ 16-Bit Data Memory RAM
Three-Phase 16-Bit PWM Generator
16-Bit Center-Based PWM Generator
Programmable Deadtime and Narrow Pulse Deletion
(Continued on page 7)
FUNCTIONAL BLOCK DIAGRAM
ADSP-2100 BASE
ARCHITECTURE
PROGRAM
ROM
2K ؋ 24
DAG 1
DAG 2
PROGRAM
SEQUENCER
MEMORY
PROGRAM
RAM
2K ؋ 24
DATA
ADDRESS
GENERATORS
DATA
RAM
1K ؋ 16
WATCHDOG
TIMER
24-BIT
PIO
PROGRAM MEMORY ADDRESS
DATA MEMORY ADDRESS
PROGRAM MEMORY DATA
DATA MEMORY DATA
ARITHMETIC UNITS
ALU
MAC
SHIFTER
SERIAL PORTS
SPORT 0
SPORT 1
TIMER
2 ؋ 8 BIT
AUX
PWM
7
ANALOG
INPUTS
16-BIT
3-PHASE
PWM
REV. B
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© Analog Devices, Inc., 2000
