dsp56857 Freescale Semiconductor, Inc, dsp56857 Datasheet - Page 4

• Manufacturer Part Number: dsp56857
• Description: Dsp56857 Digital Signal Controller
• Manufacturer: Freescale Semiconductor, Inc

Part 1 Overview
1.1 56857 Features
1.1.1
1.1.2
1.1.3
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Efficient 16-bit engine with dual Harvard architecture
120 Million Instructions Per Second (MIPS) at 120MHz core frequency
Single-cycle 16 × 16-bit parallel Multiplier-Accumulator (MAC)
Four (4) 36-bit accumulators including extension bits
16-bit bidirectional shifter
Parallel instruction set with unique DSP addressing modes
Hardware DO and REP loops
Three (3) internal address buses
Four (4) internal data buses
Instruction set supports both DSP and controller functions
Four (4) hardware interrupt levels
Five (5) software interrupt levels
Controller-style addressing modes and instructions for compact code
Efficient C Compiler and local variable support
Software subroutine and interrupt stack with depth limited only by memory
JTAG/Enhanced OnCE debug programming interface
Harvard architecture permits up to three (3) simultaneous accesses to program and data memory
On-Chip Memory
— 40K × 16-bit Program RAM
— 24K × 16-bit Data RAM
— 1K × 16-bit Boot ROM
— Chip Select Logic used as dedicated GPIO
General Purpose 16-bit Quad Timer*
Two Serial Communication Interfaces (SCI)*
Serial Peripheral Interface (SPI) Port*
Two (2) Enhanced Synchronous Serial Interface (ESSI) modules*
Computer Operating Properly (COP)/Watchdog Timer
JTAG/Enhanced On-Chip Emulation (OnCE) for unobtrusive, real-time debugging
Six (6) independent channels of DMA
Digital Signal Processing Core
Memory
Peripheral Circuits for 56857
56857 Technical Data, Rev. 6
Freescale Semiconductor