Features

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

• Advanced RISC Architecture

– 131 Powerful Instructions – Most Single-clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 20 MIPS Throughput at 20 MHz

– On-chip 2-cycle Multiplier

• High Endurance Non-volatile Memory segments

– 16/32/64/128K Bytes of In-System Self-programmable Flash program memory

(ATmega164PA/324PA/644PA/1284P)

– 512B/1K/2K/4K Bytes EEPROM (ATmega164PA/324PA/644PA/1284P)

– 1/2/4/16K Bytes Internal SRAM (ATmega164PA/324PA/644PA/1284P)

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

– Data retention: 20 years at 85°C/ 100 years at 25°C(1)

– 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

• JTAG (IEEE std. 1149.1 Compliant) Interface

– Boundary-scan Capabilities According to the JTAG Standard

– Extensive On-chip Debug Support

– Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface

• Peripheral Features

– Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes

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

– Real Time Counter with Separate Oscillator

– Six PWM Channels

– 8-channel, 10-bit ADC

Differential mode with selectable gain at 1x, 10x or 200x

– Byte-oriented Two-wire Serial Interface

– Two Programmable Serial USART

– Master/Slave SPI Serial Interface

– Programmable Watchdog Timer with Separate On-chip Oscillator

– On-chip Analog Comparator

– Interrupt and Wake-up on Pin Change

• Special Microcontroller Features

– Power-on Reset and Programmable Brown-out Detection

– Internal Calibrated RC Oscillator

– External and Internal Interrupt Sources

– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby and

Extended Standby

• I/O and Packages

– 32 Programmable I/O Lines

– 40-pin PDIP, 44-lead TQFP, 44-pad VQFN/QFN/MLF

– 44-pad DRQFN

– 49-ball VFBGA

• Operating Voltages

– 1.8 - 5.5V

• Speed Grades for ATmega164PA/324PA/644PA/1284P

– 0 - 20MHz @ 1.8 - 5.5V

• Power Consumption at 1 MHz, 1.8V, 25°C

– Active: 0.4 mA

– Power-down Mode: 0.1µA

– Power-save Mode: 0.6µA (Including 32 kHz RTC)