Fundamentals of Single-chip Microcomputer外文文献翻译 电子信息工程 单片机基.doc

外文原文 Fundamentals of Single-chip Microcomputer Dr. Dobbs MacintoshJournal Abstract The single-chip microcomputer is the culmination of both the development of the digital computer and the integrated circuit arguably the tow most significant inventions of the 20th century . These tow types of architecture are found in single-chip microcomputer. Some employ the split program/data memory of the Harvard architecture, shown in Fig.3-5A-1, others follow the philosophy, widely adapted for general-purpose computers and microprocessors, of making no logical distinction between program and data memory as in the Princeton architecture. In general terms a single-chip microcomputer is characterized by the incorporation of all the units of a computer into a single device. Keyword: Single-chip Microcomputer ROM RAM Programming Algorithm Features ? Compatible with MCS-51? Products ? 4K Bytes of In-System Reprogrammable Flash Memory – Endurance: 1,000 Write/Erase Cycles ? Fully Static Operation: 0 Hz to 24 MHz ? Three-level Program Memory Lock ? 128 x 8-bit Internal RAM ? 32 Programmable I/O Lines ? Two 16-bit Timer/Counters ? Six Interrupt Sources ? Programmable Serial Channel ? Low-power Idle and Power-down Modes Description The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4Kbytes of Flash programmable and erasable read only memory (PEROM). The deviceis manufactured using Atmel’s high-density nonvolatile memory technology and iscompatible with the industry-standard MCS-51 instruction set and pinout. The on-chipFlash allows the program memory to be reprogrammed in-system or by a conventionalnonvolatile memory programmer. By combining a versatile 8-bit CPU with Flashon a monolithic chip, the Atmel AT89C51 is a powerful microcomputer which providesa highly-flexible and cost-effective solution to many embedded control applications.The AT89C51 provides the following standard features: 4Kbytes of Flash, 128 bytes of RAM, 32 I/O lines, two 16-bittimer/coun