ATMEGA644P-A15MZ Atmel, ATMEGA644P-A15MZ Datasheet - Page 374

• Manufacturer Part Number: ATMEGA644P-A15MZ
• Description: MCU AVR 64KB FLASH 16MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644P-A15MZ

• Package / Case: 44-VQFN Exposed Pad
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 32
• Eeprom Size: 2K x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Program Memory Size: 64KB (64K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

374
ATmega164P/324P/644P
24 Boot Loader Support – Read-While-Write Self-Programming ......... 279
25 Memory Programming ......................................................................... 296
26 Electrical Characteristics .................................................................... 328
27 ATmega644P Typical Characteristics ................................................ 338
23.7
23.8
24.1
24.2
24.3
24.4
24.5
24.6
24.7
24.8
24.9
25.1
25.2
25.3
25.4
25.5
25.6
25.7
25.8
25.9
25.10
26.1
26.2
26.3
26.4
26.5
26.6
26.7
27.1
27.2
27.3
Boundary-scan Description Language Files ..................................................277
Register Description ......................................................................................278
Features ........................................................................................................279
Overview ........................................................................................................279
Application and Boot Loader Flash Sections .................................................279
Read-While-Write and No Read-While-Write Flash Sections ........................280
Boot Loader Lock Bits ...................................................................................282
Entering the Boot Loader Program ................................................................283
Addressing the Flash During Self-Programming ...........................................284
Self-Programming the Flash ..........................................................................285
Register Description ......................................................................................294
Program And Data Memory Lock Bits ...........................................................296
Fuse Bits ........................................................................................................297
Signature Bytes .............................................................................................299
Calibration Byte .............................................................................................299
Page Size ......................................................................................................299
Parallel Programming Parameters, Pin Mapping, and Commands ...............300
Parallel Programming ....................................................................................302
Serial Downloading ........................................................................................311
Serial Programming Instruction set ...............................................................313
Programming via the JTAG Interface ............................................................315
DC Characteristics .........................................................................................329
Speed Grades ...............................................................................................330
Clock Characteristics .....................................................................................331
System and Reset Characteristics ................................................................332
SPI Timing Characteristics ............................................................................333
2-wire Serial Interface Characteristics ...........................................................334
ADC Characteristics ......................................................................................336
Power-down Supply Current ..........................................................................343
Power-save Supply Current ...........................................................................344
Pin Pull-up .....................................................................................................345
7674F–AVR–09/09