ATMEGA644P-20PU

The ATmega644P is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega644P achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

• High-performance, Low-power Atmel® AVR® 8-bit Microcontroller
• Advanced RISC Architecture
  • 131 Powerful Instructions – Most Single-clock Cycle Execution ?
  • 32 × 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 ?
  • 16K/32K/64K Bytes of In-System Self-programmable Flash program memory ?
  • 512B/1K/2K Bytes EEPROM ?
  • 1K/2K/4K Bytes Internal SRAM ?
  • 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 Ca