ATMEGA8A-PU AVR Controller ATMEL

he ATmega8A is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega8A achieves throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power consumption versus processing speed.

Features

• • High-performance, Low-power AVR® 8-bit Microcontroller

• • • Advanced RISC Architecture

• • • 130 Powerful Instructions – Most Single-clock Cycle Execution

• • • 32 x 8 General Purpose Working Registers

• • • Fully Static Operation

• • • Up to 16 MIPS Throughput at 16 MHz

• • • On-chip 2-cycle Multiplier

• • High Endurance Non-volatile Memory segments

• • • 8K Bytes of In-System Self-programmable Flash program memory

• • • 512 Bytes EEPROM

• • • 1K Byte Internal SRAM

• • • Write/Erase Cycles: 10,000 Flash/100,000 EEPROM

• • • Data retention: 20 years at 85°C/100 years at 25°C

• • • Optional Boot Code Section with Independent Lock Bits

• • • • In-System Programming by On-chip Boot Program

• • • • True Read-While-Write Operation

• • • Programming Lock for Software Security

• • Peripheral Features

• • • Two 8-bit Timer/Counters with Separate Prescaler, one Compare Mode

• • • One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode

• • • Real Time Counter with Separate Oscillator

• • • Three PWM Channels

• • • 8-channel ADC in TQFP and QFN/MLF package

• • • • Eight Channels 10-bit Accuracy

• • • 6-channel ADC in PDIP package

• • • • Six Channels 10-bit Accuracy

• • • Byte-oriented Two-wire Serial Interface

• • • Programmable Serial USART

• • • Master/Slave SPI Serial Interface

• • • Programmable Watchdog Timer with Separate On-chip Oscillator

• • • On-chip Analog Comparator

• • Special Microcontroller Features

• • • Power-on Reset and Programmable Brown-out Detection

• • • Internal Calibrated RC Oscillator

• • • External and Internal Interrupt Sources

• • • Five Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, and Standby

• • I/O and Packages

• • • 23 Programmable I/O Lines

• • • 28-lead PDIP

• • Operating Voltages

• • • 2.7 – 5.5V

• • Speed Grades

• • • 0 – 16 MHz

• • Power Consumption at 4 Mhz, 3V, 25°C

• • • Active: 3.6 mA

• • • Idle Mode: 1.0 mA

• • Power-down Mode: 0.5 μA