ATMEL
8 BIT MICRO-CONTROLLER WITH 4K BYTES FLASH
Features
-Endurance: 1,000 Write/Erase cycle
* Fully static operation: 0 Hz to 24 MHz’
* Three level programming memory lock
* 128 x 8 bit internal RAM
* 32 programmable I/O lines
* Two 16 bit Timer/Counters
* Six interrupt source
* Programmable serial channel
* Low-power idle and power-down modes
DESCRIPTIONS
The AT 89C51 is low power, high performance
CMOS 8 bit microcomputer with 4K bytes of flash programmable and erasable read only memory (PEROM).the device is manufactured using Atmel’s high density non volatile memory technology and is compatible with industry –standard MCS -51 instruction set and pin out .the on-chip Flash allows the program memory to be reprogrammed in system or by a conventional non volatile memory programmer. By combining a versatile 8 bit CPU with Flash on a monolithic chip, The Atmel At89C51 is a powerful microcomputer which provide a highly flexible and cost effective solution to many embedded control applications
The AT89C51 provides the following standards features :
*
* 4K bytes of flash
* 128 bytes of Ram
* 32 I/O lines
* two 16 bit timer/counters
* a five vector two level interrupt architecture
* a full duplex serial port
* on chip oscillator an clock circuitry
In addition the AT89C51 is designed with static logic for operations down to zero frequency and support two software selectable power saving modes
IDLE mode: CPU is stop , all other component continue to working
POWER_DOWN mode: freezing the oscillator, nothing is working. but saves the memory content in the RAM
Labels: ATMEL 89C51