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56853 General Description

? 120 MIPS at 120MHz

? 12K x 16-bit Program SRAM

? 4K x 16-bit Data SRAM

? 1K x 16-bit Boot ROM

? Access up to 2M words of program memory or 8M of

data memory

? Chip Select Logic for glue-less interface to ROM and

SRAM

? Six (6) independent channels of DMA

? Enhanced Synchronous Serial Interfaces (ESSI)

? Two (2) Serial Communication Interfaces (SCI)

? Serial Port Interface (SPI)

? 8-bit Parallel Host Interface

? General Purpose 16-bit Quad Timer

? JTAG/Enhanced On-Chip Emulation (OnCE?) for

unobtrusive, real-time debugging

? Computer Operating Properly (COP)/Watchdog Timer

? Time-of-Day (TOD)

? 128 LQFP package

? Up to 41 GPIO

1.1 56853 Features

1.1.1Core

?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 and one (1) external address bus

?Four (4) internal data buses and one (1) external data bus

?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

1.1.2Memory

?Harvard architecture permits up to three (3) simultaneous accesses to program and data memory

?On-Chip Memory

—12K × 16-bit Program SRAM

—4K × 16-bit Data SRAM

—1K × 16-bit Boot ROM

?Off-Chip Memory Expansion (EMI)

—Access up to 2M words of program memory or 8M data memory

—Chip Select Logic for glue-less interface to ROM and SRAM

1.1.3Peripheral Circuits for 56853

?General Purpose 16-bit Quad Timer*

?Two (2) Serial Communication Interfaces (SCI)*

?Serial Peripheral Interface (SPI) Port*

?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

?8-bit Parallel Host Interface*

?Time-of-Day (TOD)

?128 LQFP package

?Up to 41 GPIO

* Each peripheral I/O can be used alternately as a General Purpose I/O if not needed

1.1.4Energy Information

?Fabricated in high-density CMOS with 3.3V, TTL-compatible digital inputs

?Wait and Stop modes available