Microcontroller

The AT89S8253 is a low-power, high-performance CMOS 8-bit microcontroller with12K bytes of In-System Programmable (ISP) Flash program memory jury and 2K bytes of EEPROM selective information memory. The device is manufactured using Atmels high-density non-volatile memory engineering science and is compatible with the industry-standard MCS-51 instruction curing and pinout. The on-chip downloadable Flash everyows the program memory to be reprogrammed in- trunk with an SPI successive interface or by a conventional nonvolatilizable memory programmer. By trust a versatile 8-bit fundamental processing unit with downloadable Flash on a monolithic chip, the Atmel AT89S8253 is a powerful microcontroller which provides a highly-flexible and cost-effective response to many a(prenominal) embedded control applications. The AT89S8253 provides the following standard features: 12K bytes of In-System Programmable Flash, 2K bytes of EEPROM, 256 bytes of RAM, 32 I/O lines, programmable watchd og horologe, two data pointers, triad 16-bit timer/counters, a six-vector, four-level interrupt architecture, a full duplex nonparallel port, on-chip oscillator, and clock circuitry. In addition, the AT89S8253 is designed with static logical clay for operation down to zero frequency and supports two software product system selectable power saving modes.

The Idle Mode cabbage the CPU while allowing the RAM, timer/counters, serial port, and interrupt system to pass on functioning. The Power-down mode saves the RAM contents still freezes the oscillator, disabling all other chip functions until the next remote in terrupt or hardware reset. The on-board Flas! h/EEPROM is accessible through the SPI serial interface. retention RESET active forces the SPI bus into a serial programme interface and allows the program memory to be written to or read from, unless one or more than lock bits open been activated. 1.1.3PIN DESCRIPTION: 1.1.3.1 VCC Supply voltage (all packages exclude 42-PDIP). 1.1.3.2 GND Ground (all packages except 42-PDIP; for 42-PDIP GND connects only the logic core and the embedded...If you postulate to get a full essay, order it on our website: BestEssayCheap.com

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