• 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 Prescaler and Compare Mode
– 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×
– One Byte-oriented 2-wire Serial Interface (Philips I
2
C compatible)
– Two Programmable Serial USART
– One Master/Slave SPI Serial Interface
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-chip Analog Comparator
– 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 Reduction, Power-save, Power-down, Standby, and
Extended Standby
• I/O and Packages
– 32 Programmable I/O Lines
– 40-pin PDIP
– 44-lead TQFP
– 44-pad VQFN/QFN
• Operating Voltage:
– 1.8 - 5.5V
• Speed Grades
– 0 - 4MHz @ 1.8V - 5.5V
– 0 - 10MHz @ 2.7V - 5.5V
– 0 - 20MHz @ 4.5 - 5.5V
• Power Consumption at 1MHz, 1.8V, 25°C
– Active Mode: 0.4mA
– Power-down Mode: 0.1μA
– Power-save Mode: 0.6μA (Including 32kHz RTC)
Note:
1. Refer to Data Retention
Related Links
Data Retention on page 13
Atmel ATmega644PA [DATASHEET]
Atmel-42717C-ATmega644PA_Datasheet_Summary-10/2016
2
