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DS87C520QCL

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仕様・特性

DS87C520/DS83C520 EPROM/ROM High-Speed Micro www.dalsemi.com FEATURES PACKAGE OUTLINE 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 - 16 kB program memory - 1 kB extra on-chip SRAM for MOVX ROMSIZE feature - Selects internal ROM size from 0-16 kB - 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 33 MHz clock rates - Single-cycle instruction in 121 ns - 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 total interrupt sources with 6 external Available in 40-pin PDIP, 44-pin PLCC, 44-pin TQFP, and 40-pin windowed CERDIP Factory Mask DS83C520 or EPROM (OTP) DS87C520 1 of 42 070300

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