Maxim DS83C520 Manuals

This file introduces the features of 80C51 series compatible 80C52, including 80C52 compatible 8051 pin and instruction set, four 8-bit I/O ports, three 16-bit timers/counters, 256 bytes of on-chip memory, 16KB of program memory, 1KB of additional on-chip SRAM for MOVX, ROMSIZE feature selects internal ROM size from 0 to 16KB, allows access to entire external memory mapping, 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, 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 recovery, on-chip oscillator, on-chip power management, on-chip power monitor, on-chip reset, on-chip EEPROM, on-chip flash, on-chip RAM, on-chip I/O.

The DS87C520/DS83C520 is a high-integration 80C52 compatible microcontroller with four 8-bit I/O ports, three 16-bit timers/counters, 256 bytes of on-chip RAM and 16KB of program memory.

This document describes the features and characteristics of a high-speed microcontroller, including 80C52 compatibility, 8051 pin and instruction set compatibility, four 8-bit I/O ports, three 16-bit timer/counters, 256 bytes of scratchpad RAM, etc.