Features: 20 MIPS Fixed-Point DSP Core Single Cycle Instruction Execution (50 ns)ADSP-21xx Family Code Compatible Independent Computational Units ALU Multiplier/AccumulatorBarrel Shifter Multifunction Instructions Single Cycle Context Switch Powerful Program Sequencer Zero Overhead Looping Conditi...
ADMCF327: Features: 20 MIPS Fixed-Point DSP Core Single Cycle Instruction Execution (50 ns)ADSP-21xx Family Code Compatible Independent Computational Units ALU Multiplier/AccumulatorBarrel Shifter Multifuncti...
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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 Package
The ADMCF327 is a low cost, single-chip DSP-based controller,suitable for permanent magnet synchronous motors, ac induction motors, and brushless dc motors. The ADMCF327 integrates a 20 MIPS, fixed-point DSP core with a complete set of motor control and system peripherals that permits fast, efficient development of motor controllers.
The DSP core of the ADMCF327 is the ADSP-2171, which is completely code-compatible with the ADSP-21xx 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 (× squared), biased rounding and global interrupt masking.
The system peripherals are the power-on reset circuit (POR),the watchdog timer and a synchronous serial port. The serial port is configurable, and double buffered, with hardware support for UART and SCI port emulation.
The ADMCF327 provides 512 × 24-bit program memory RAM,4K × 24-bit program memory ROM, 4K × 24-bit program FLASH memory, and 512 × 16-bit data memory RAM. The user code will be stored and executed from the flash memory.The program and data memory RAM can be used for dynamic data storage or can be loaded through the serial port from an external device as in other ADMCxxx family parts. The program memory ROM contains a monitor function as well as useful routines for erasing, programming, and verifying the flash memory.
The motor control peripherals of the ADMCF327 provide a 12-bit analog data acquisition system with six analog input channels,and an internal voltage reference. In addition, a three-phase,16-bit, center-based PWM generation unit can be used to produce high accuracy PWM signals with minimal processor overhead.The ADMCF327 also contains two auxiliary PWM outputs and nine lines of digital I/O.
Because the ADMCF327 has a limited number of pins, functions such as the auxiliary PWM and the serial communication port are multiplexed with the nine programmable input/output (PIO)pins. The pin functions can be independently selected to allow maximum flexibility for different applications.