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Description

The AT90S4434/8535 is a low-power CMOS 8-bit microcontroller based on the AVR? enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the AT90S4434/8535 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Features

? Utilizes the AVR ? Enhanced RISC Architecture

? AVR - High Performance and Low Power RISC Architecture

? 118 Powerful Instructions - Most Single Clock Cycle Execution

? 8K bytes of In-System Programmable Flash AT90S/LS8535

4K bytes of In-System Programmable Flash AT90S/LS4434

– SPI Serial Interface for In-System Programming

– Endurance: 1,000 Write/Erase Cycles

? 512 bytes EEPROM AT90S/LS8535

256 bytes EEPROM AT90S/LS4434

– Endurance: 100,000 Write/Erase Cycles

? 512 bytes Internal SRAM AT90S/LS8535

256 bytes Internal SRAM AT90S/LS4434

? 8-Channel, 10-Bit ADC

? 32 x 8 General Purpose Working Registers

? 32 Programmable I/O Lines

? Programmable Serial UART

? VCC: 4.0 - 6.0V AT90S4434/AT90S8535

? VCC: 2.7 - 6.0V AT90LS4434/AT90LS8535

? Speed Grades:

0 - 8 MHz AT90S4434/AT90S8535,

0 - 4 MHz (AT90LS4434/AT90LS8535

? Power-On Reset Circuit

? Up to 8 MIPS Throughput at 8 MHz

? RTC with Separate Oscillator and Counter Mode

? Two 8-Bit Timer/Counters with Separate Prescaler and Compare Mode

? One 16-Bit Timer/Counter with Separate Prescaler and Compare and Capture Modes

? 3 PWM channels

? External and Internal Interrupt Sources

? Programmable Watchdog Timer with On-Chip Oscillator

? On-Chip Analog Comparator

? Three Sleep Modes: Idle, Power Save, and Power Down

? Programming Lock for Software Security