REV.0
a
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ADMCF341
DashDSP
™
28-Lead Flash Mixed-Signal DSP
with Enhanced Analog Front End
FUNCTIONAL BLOCK DIAGRAM
MEMORY BLOCK
PROGRAM
ROM
4K x 24
PROGRAM
FLASH
4K x 24
PROGRAM
RAM
512 x 24
DATA
MEMORY
512 x 16
V
REF
ANALOG
INPUTS 16-BIT
THREE-
PHASE
PWM
POR TIMER
SERIAL PORT
SPORT 0
PIO
2 x 16-BIT
AUX
PWM
WATCH-
DOG
TIMER
ADSP-21xx BASE
ARCHITECTURE
DATA
ADDRESS
GENERATORS
DAG 1 DAG 2
PROGRAM
SEQUENCER
ARITHMETIC UNITS
SHIFTERMACALU
PROGRAM MEMORY ADDRESS
DATA MEMORY ADDRESS
PROGRAM MEMORY DATA
DATA MEMORY DATA
2.5V
SPORT 1
MOTOR CONTROL PERIPHERALS
ADC SUBSYSTEM
I
SENSE
AMP
AND TRIP
SHA
3
TIMERS
MULTIPLEXED ON EXTERNAL PINS
3
6
9
7
2
DashDSP is a trademark of Analog Devices, Inc.
FEATURES
20 MHz Fixed-Point DSP Core
Single-Cycle Instruction Execution (50 ns)
ADSP-21xx Family Code Compatibility
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 H11547 16-Bit Data Memory RAM
512 H11547 24-Bit Program Memory RAM
4K H11547 24-Bit Program Memory ROM
4K H11547 24-Bit Program Flash Memory
Three Independent Flash Memory Sectors
3584 H11547 24-Bit, 256 H11547 24-Bit, 256 H11547 24-Bit
Low-Cost Pin-Compatible ROM Option
16-Bit Watchdog Timer
Programmable 16-Bit Internal Timer with Prescaler
Two Double Buffered Serial Ports with SPI Mode Support
Integrated Power-On Reset Function
Three-Phase 16-Bit PWM Generation Unit:
16-Bit Center-Based PWM Generator
Programmable PWM Pulsewidth
Edge Resolution to 50 ns
153 Hz Minimum Switching Frequency
Double/Single Duty Cycle Update Mode Control
Individual Enable and Disable for Each PWM Output
High-Frequency Chopping Mode for Transformer
Coupled Gate Drives
External PWMTRIP Pin
Integrated 6-Channel ADC Subsystem
Three Bipolar I
SENSE
Inputs with Programmable
Sample-and-Hold Amplifier and Overcurrent Pro-
tection (Usable as Three Dedicated Analog Inputs)
Muxed Auxiliary Analog Inputs
Internal Voltage Reference (2.5 V)
Acquisition Synchronized to PWM Switching
Frequency
9-Pin Digital I/O Port
Bit Configurable as Input or Output
Change of State Interrupt Support
Two 16-Bit Auxiliary PWM Timers
Synthesized Analog Output
Programmable Frequency
0% to 100% Duty Cycle
Two Programmable Operational Modes
Independent Mode/Offset Mode
Motor Types
Permanent Magnet Synchronous Motors (PMSM)
Brushless DC Motors (BDCM)
AC Induction Motors (ACIM)
APPLICATIONS
Refrigerator and Air Conditioner Compressor
Washing Machines
Industrial Variable Speed Drives
HVAC