atmega644pa 概述
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.
atmega644pa 特性
- atmega644pa is a picopower technology avr microcontroller
- 64kb self-programming flash program memory
- 4kb sram
- 2kb eeprom
- 8 channel 10-bit a/d-converter
- jtag interface for on-chip-debug
- up to 20 mips throughput at 20 mhz
- 1.8 - 5.5v operation voltage
