DS83C520 Datasheet | Maxim Integrated

FEATURES - 80C52 patible 8051 Pin- and Instruction-Set patible Four 8-Bit I/O Ports Three 16-Bit Timer/Counters 256 Bytes Scratchpad RAM - Large On-Chip Memory 16k B Program Memory 1k B Extra On-Chip SRAM for MOVX - ROMSIZE Feature Selects Internal ROM Size from 0 to 16k B Allows Access to Entire External Memory Map Dynamically Adjustable by Software Useful as Boot Block for External Flash - High-Speed Architecture 4 Clocks/Machine Cycle (8051 = 12) Runs DC to 33MHz Clock Rates Single-Cycle Instruction in 121ns Dual Data Pointer Optional Variable Length MOVX to Access Fast/Slow RAM/Peripherals - Power Management Mode Programmable Clock Source to Save Power CPU Runs from (crystal/64) or (crystal/1024) Provides Automatic Hardware and Software Exit - EMI Reduction Mode Disables ALE - Two Full-Duplex Hardware Serial Ports - High Integration Controller Includes: Power-Fail Reset Early-Warning...