DS87C520 Datasheet

EPROM/ROM High-Speed Microcontrollers


• 80C52 Compatible 8051 Pin- and Instruction-Set Compatible Four 8-Bit I/O Ports Three 16-Bit Timer/Counters 256 Bytes Scratchpad RAM• Large On-Chip Memory 16kB Program Memory 1kB Extra On-Chip SRAM for MOVX• ROMSIZE Feature Selects Internal ROM Size from 0 to 16kB 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 Power-Fail Interrupt Programmable Watchdog Timer• 13 Interrupt Sources with Six External• Available in 40-pin PDIP, 44-Pin PLCC, 44-Pin TQFP, and 40-Pin Windowed CERDIP


[{"Name":"Data Bus Width","Value":"8 bit "},{"Name":"Maximum Clock Frequency","Value":"33 MHz "},{"Name":"Program Memory Size","Value":"16 KB "},{"Name":"Data RAM Size","Value":"1 KB "},{"Name":"Operating Supply Voltage","Value":"4.5 V to 5.5 V"},{"Name":"Minimum Operating Temperature","Value":"0 C"},{"Name":"Supply Voltage - Max","Value":"5.5 V "},{"Name":"Supply Voltage - Min","Value":"4.5 V "},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information

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