![]() ![]() 20 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution).60 MHz (Vcc 4.5V to 5.5V and Internal Code execution only).AT89C51 datasheet, AT89C51 circuit, AT89C51 data sheet: ATMEL 8-Bit Microcontroller with 4K Bytes Flash,alldatasheet, datasheet, Datasheet search site. Pdf of AT89C51 datasheet & pin diagram are also available at Engineers. 40 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution) 89C51 or AT89C51 is an 8-bit microcontroller and belongs to Atmel’s family.2048 Bytes Boot ROM Contains Low Level Flash Programming Routines and a Default Serial Loader.ISP (In-System Programming) Using Standard VCC Power Supply.Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply.– 9 Interrupt Sources with 4 Priority Levels – Six 8-bit I/O Ports (64 Pins or 68 Pins Versions) The AT89C51ED2 provides 2048 bytes of EEPROM for nonvolatile data storage. ![]() The AT89C51RD2/ED2 retains all of the features of the Atmel 80C52 with 256 bytes of internal RAM, a 9-source 4-level interrupt controller and three timer/counters. The programming voltage is internally generated from the standard VCC pin. The 64-Kbytes Flash memory can be programmed eitherin parallel mode or in serial mode with the ISP capability or with software. It contains a 64-Kbyte Flash memory block for code and for data. AT89C51RD2/ED2 is high performance CMOS Flash version of the 80C51 CMOS single chip 8-bit microcontroller. ![]()
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