IS89C51芯片解密

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    关于IS89C51单片机：

The ISSI IS89C51 is a high-performance microcontroller fabricated using high-density CMOS technology. The CMOS IS89C51 is functionally compatible with the industry standard 80C51 microcontrollers.

　　The IS89C51 is designed with 4-Kbytes of Flash memory, 128 x 8 RAM; 32 programmable I/O lines; a serial I/O port for either multiprocessor communications, I/O expansion or full duplex UART; two 16-bit timer/counters; an six-source, two-priority-level, nested interrupt structure; and an on-chip oscillator and clock circuit. The IS89C51 can be expanded using standard TTL compatible memory.

　　IS89C51 FEATURES

　　80C51 based architecture

　　4-Kbytes of on-chip Reprogrammable Flash Memory

　　128 x 8 RAM

　　Two 16-bit Timer/Counters

　　Full duplex serial channel

　　Boolean processor

　　Four 8-bit I/O ports, 32 I/O lines

　　Memory addressing capability

　　– 64K ROM and 64K RAM

　　Program memory lock

　　– Lock bits (3)

　　Power save modes:

　　– Idle and power-down

　　Six interrupt sources

　　Most instructions execute in 0.3 ms

　　CMOS and TTL compatible

　　Maximum speed: 40 MHz @ Vcc = 5V

　　Industrial temperature available

　　Packages available:

　　– 40-pin DIP

　　– 44-pin PLCC

　　– 44-pin PQFP