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
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
ApplicationWashing Machines, Refrigerator Compressors, Fans,Pumps, Industrial Variable Speed Drives
Pinout
SpecificationsSupply Voltage (VDD) . . . . . . . . . . . . . . . . . . 0.3 V to +7.0 V
Supply Voltage (AVDD) . . . . . . . . . . . . . . . . . 0.3 V to +7.0 V
Input Voltage . . . . . . . . . . . . . . . . . . . . 0.3 V to VDD + 0.3 V
Output Voltage Swing . . . . . . . . . . . . . 0.3 V to VDD + 0.3 V
Operating Temperature Range (Ambient) . . . 40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . 65°C to +150°C
Lead Temperature (5 sec) . . . . . . . . . . . . . . . . . . . . . .+280°CDescriptionThe ADMC331 is a low cost, single-chip DSP-based controller,suitable for ac induction motors, permanent magnet synchronous 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 permits 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 generators and a program sequencer. The computational units comprise an ALU, a multiplier/accumulator (MAC) and a barrel shifter. The ADSP-2171 adds new instructions for bit manipulation,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),E2PROM, 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 watchdog timer and expanded capability through the serial ports and 24-bit digital I/O ports.
ADMC331 Data Sheet
