ATMEGA644P
Overview
- 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 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 1×, 10× or 200× ̶ 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 Atmel-8011R-AVR-ATmega164P/V-324P/V-644P/V-Datasheet_09/2015 ̶ 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 Redu
