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ADMCF341BR
DashDSP⑩ 28-Lead Flash Mixed-Signal DSP with Enhanced Analog Front End
REV.0
DashDSP™ 28-Lead Flash Mixed-Signal DSP
with Enhanced Analog Front End
FUNCTIONAL BLOCK DIAGRAMDashDSP 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 � 16-Bit Data Memory RAM
512 � 24-Bit Program Memory RAM
4K � 24-Bit Program Memory ROM
4K � 24-Bit Program Flash Memory
Three Independent Flash Memory Sectors
3584 � 24-Bit, 256 � 24-Bit, 256 � 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 ISENSE 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
ADMCF341–SPECIFICATIONS
ANALOG-TO-DIGITAL CONVERTERZero Offset
NOTESResolution varies with PWM switching frequency (double update mode) 78.1 kHz = 8 bits, 4.9 kHz = 12 bits.2.44KHz sample frequency, VAUX0, VAUX1, VAUX2.Extrapolated point outside of operating range. 2.44KHz sample frequency.
Specifications subject to change without notice.
SENSE AMPLIFIER–TRIPISENSE Gain Channel Matching
ISENSE Gain Stability
ISENSE Linearity
ISENSE Signal-to-Noise Ratio (SNRD)
ISENSE Signal-to-Noise Ratio Less Distortion
ISENSE Total Harmonic Distortion
ISENSE Input Current
ISENSE Input Resistance
TRIP Threshold Low
TRIP Threshold High
NOTESVariation of gain with VDD and temperature.VIN = –400 mV to +400 mV.fIN = 1 kHz sine wave, VIN = –400 mV to +400 mV, fS = 4 kHz.High or low trip threshold.
CURRENT SOURCE1NOTESFor ADC calibration.0.3 V to 3.5 V ICONST voltage.
(VDD = 5%, GND = 0 V. TA = –40�C to +85�C. CLKIN = 10 MHz, unless
otherwise noted.)
ADMCF341
VOLTAGE REFERENCESpecifications subject to change without notice.
POWER-ON RESET16 CLKOUT cycles.
Specifications subject to change without notice.
ELECTRICAL CHARACTERISTICSVOL
NOTESOutput pins PIO0-PIO8, AH, AL, BH, BL, CH, CL.XTAL pin.Internal pull-up, RESET.Internal pull-down, PWMTRIP, PIO0-PIO8.Three stateable pins, DT1, RFS1, TFS1, SCLK1.Outputs not switching.
Specifications subject to change without notice.
ADMCF341
SPECIFICATIONS (continued)
FLASH MEMORYSpecifications subject to change without notice.
TIMING PARAMETERSa frequency equal to half the instruction rate; a 10 MHz input clock (which is
equivalent to 100
When tCK values are within the range of 0.5
Switching Characteristics:
Control Signals
PWM Shutdown Signals*Applies after power-up sequence is complete.
Specifications subject to change without notice.
ADMCF341
TIMING PARAMETERSSpecifications subject to change without notice.
Figure 2.Serial Port Timing
