ATMEGA8A-PU Atmel 8 Bit 8K AVR Microcontroller

Description

The 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.

• 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