|Speed Grades||0 - 4 MHz @ 1.8 - 5.5V
0 - 10 MHz @ 2.7 - 5.5V
0 - 20 MHz @ 4.5 - 5.5V
|Max I/O Pins||32|
|Boot Code (Bytes)||included|
|PDIP40, TQFP44, VQFN/QFN/MLF44|
The ATmega644PA is a high-performance picoPower 8-bit AVR RISC-based microcontroller, ATmega644PA combines 64KB ISP flash memory with read-while-write capabilities, 2KB EEPROM, 4KB SRAM, 32 general purpose I/O lines, 32 general purpose working registers, a real time counter, three flexible timer/counters with compare modes and PWM, two USARTs, a byte oriented 2-wire serial interface, an 8-channel 10-bit A/D converter with optional differential input stage with programmable gain, programmable watchdog timer with internal oscillator, SPI serial port, a JTAG (IEEE 1149.1 compliant) test interface for on-chip debugging and programming, and six software selectable power saving modes. The device operates between 1.8-5.5 volts.
By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, balancing power consumption and processing speed.