煤矿供电系统的保护设计 ——软件设计英文文献翻译.doc

英文文献翻译 专业班级： 电气工程及其自动化06级4班 学生姓名： 于文超 学 号： 068062418 二〇一〇年 五月二十五AT89C51 is a flickering 4K bytes can erase Programmable read-only Memory (FPEROM Erasable Programmable Read -- -- Falsh with Memory of how low voltage, high) CMOS8 a microprocessor chip, called. AT89C2051 is a flickering 2K bytes with a programmable read-only memory can be erased the microcontroller. The chip can erase read-only memory can be erased 100 times repeatedly. This device adopts ATMEL high-density non-volatile storage technology, manufacturing and industrial standard MCS - 51 instruction set and output tube JiaoXiang compatible. Due to the CPU and multi-function 8-bit will flash memory chips, in a single ATMEL of AT89C51 is a kind of effective micro controller, it is a kind of AT89C2051 streamlined version. For many AT89C MCU embedded control system provides a high flexibility and inexpensive solutions. 1Major features:. Compatible with MCS, 51 - 4K bytes, programmable flash memory Life: 1000 write/wipe cycle Data retention time: 10 years The static job, 0Hz: 24Hz - 3, a program memory lock 128 * 8 bits, internal RAM 32 programmable, I/O 16, two timers/counters Interrupt source, 5 programmable serial passage The idle, low power consumption and power mode Within the oscillator and clock, slice 2 tube foot: The VCC: power supply voltage. GND: grounding. Mouth: for P0 P0 mouth open a two-way leakage level I/O, each foot can absorb 8TTL gate current. When the pipe mouth P1 first write 1 foot, is defined as the high impedance input. External programs can be used for P0 data storage, it can be defined as the eighth data/address. In programming, FIASH P0 mouth as the original code, when FIASH input and output to calibrate the original code, P0 P0 external must be pulled. P1 : P1 mouth: is an internal provides the resistance of the eight two-way I/O buffers, P1 mouth can receive 4TTL gate current output. The one foot P1, internal and can be used for high input, P1 mouth by external down for