ATMega644P-20PU DIP-40 8-bit MCU flash 64k

Microcontroller based on the AVR RISC architecture.

Max CPU operating frequency: 20MHz
Flash: 64kB
RAM: 4kB
EEPROM: 2kB

Features

* 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

* 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
* 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
* 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

* 32 Programmable I/O Lines
* Speed Grades: 0 – 10 MHz @ 2.7V – 5.5V, 0 – 20 MHz @ 4.5V – 5.5V
* Temperature Range: Industrial (-40° to +85°C)