AT89C51RD2开发套件

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AT89C51RD2开发套件中的AT89C51RD2是高性能CMOS Flash版本的80C51 CMOS单芯片8 - 位微控制器。它包含了代码和数据的64 - Kbyte闪存块。64 KB的闪存可以编程无论是在并行模式或串行模式与在ISP能力或软件。AT89C51RD2/ED2 is high performance CMOS Flash version of the 80C51 CMOS single chip 8-bit microcontroller. It contains a 64-Kbyte Flash memory block for code and for data.The 64-Kbytes Flash memory can be programmed either in parallel mode or in serial mode withthe ISP capability or with software. The programming voltage is internally generated from thestandard VCC?pin.The AT89C51RD2/ED2 retains all of the features of the Atmel 80C52 with 256 bytes of internalRAM, a 9-source 4-level interrupt controller and three timer/counters. The AT89C51ED2 provides 2048 bytes of EEPROM for nonvolatile data storage.In addition, the AT89C51RD2/ED2 has a Programmable Counter Array, an XRAM of 1792bytes, a Hardware Watchdog Timer, SPI interface, Keyboard, a more versatile serial channelthat facilitates multiprocessor communication (EUART) and a speed improvement mechanism(X2 Mode).The fully static design of the AT89C51RD2/ED2 allows to reduce system power consumption bybringing the clock frequency down to any value, including DC, without loss of data.The AT89C51RD2/ED2 has 2 software-selectable modes of reduced activity and an 8-bit clockprescaler for further reduction in power consumption. In the Idle mode the CPU is frozen whilethe peripherals and the interrupt system are still operating. In the Power-down mode the RAM issaved and all other functions are inoperative.The added features of the AT89C51RD2/ED2 make it more powerful for applications that needpulse width modulation, high speed I/O and counting capabilities such as alarms, motor control,corded phones, and smart card readers.