ATmega644PR231 Atmel Corporation, ATmega644PR231 Datasheet - Page 431

• Manufacturer Part Number: ATmega644PR231
• Manufacturer: Atmel Corporation

Specifications of ATmega644PR231

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Max I/o Pins: 32
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Crypto Engine: AES
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 3
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 2
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -101
• Receive Current Consumption (ma): 13.2
• Transmit Current Consumption (ma): 14.4
• Link Budget (dbm): 104

Table of Contents
8011O–AVR–07/10
1
2
3
4
5
6
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 4
About ......................................................................................................... 8
AVR CPU Core .......................................................................................... 9
AVR Memories ........................................................................................ 18
System Clock and Clock Options ......................................................... 29
1.1 Pinout - PDIP/TQFP/VQFN/QFN/MLF .....................................................................2
1.2 Pinout - DRQFN .......................................................................................................3
2.1 Block Diagram ..........................................................................................................4
2.2 Comparison Between ATmega164P, ATmega324P and ATmega644P ..................5
2.3 Pin Descriptions .......................................................................................................6
3.1 Resources ................................................................................................................8
3.2 About Code Examples ..............................................................................................8
3.3 Data Retention .........................................................................................................8
4.1 Overview ..................................................................................................................9
4.2 ALU – Arithmetic Logic Unit ...................................................................................10
4.3 Status Register .......................................................................................................10
4.4 General Purpose Register File ...............................................................................12
4.5 Stack Pointer ..........................................................................................................13
4.6 Instruction Execution Timing ..................................................................................14
4.7 Reset and Interrupt Handling .................................................................................15
5.1 Overview ................................................................................................................18
5.2 In-System Reprogrammable Flash Program Memory ............................................18
5.3 SRAM Data Memory ..............................................................................................19
5.4 EEPROM Data Memory .........................................................................................21
5.5 I/O Memory .............................................................................................................22
5.6 Register Description ...............................................................................................23
6.1 Clock Systems and their Distribution ......................................................................29
6.2 Clock Sources ........................................................................................................30
6.3 Low Power Crystal Oscillator ..................................................................................32
6.4 Full Swing Crystal Oscillator ...................................................................................33
ATmega164P/324P/644P
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