ATMEGA644P-A15MZ Atmel, ATMEGA644P-A15MZ Datasheet - Page 370

• 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

370
ATmega164P/324P/644P
8
9
10 Interrupts ................................................................................................ 60
11 External Interrupts ................................................................................. 66
12 I/O-Ports .................................................................................................. 71
Power Management and Sleep Modes ................................................. 41
System Control and Reset .................................................................... 49
7.9
7.10
7.11
7.12
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
8.11
8.12
9.1
9.2
9.3
10.1
10.2
10.3
11.1
11.2
12.1
12.2
12.3
12.4
Timer/Counter Oscillator ..................................................................................38
Clock Output Buffer .........................................................................................38
System Clock Prescaler ..................................................................................38
Register Description ........................................................................................39
Overview ..........................................................................................................41
Sleep Modes ....................................................................................................41
BOD Disable ....................................................................................................42
Idle Mode .........................................................................................................42
ADC Noise Reduction Mode ............................................................................42
Power-down Mode ...........................................................................................43
Power-save Mode ............................................................................................43
Standby Mode .................................................................................................43
Extended Standby Mode .................................................................................43
Power Reduction Register ...............................................................................44
Minimizing Power Consumption ......................................................................44
Register Description ........................................................................................46
Internal Voltage Reference ..............................................................................53
Watchdog Timer ..............................................................................................54
Register Description ........................................................................................57
Overview ..........................................................................................................60
Interrupt Vectors in ATmega164P/324P/644P ................................................60
Register Description ........................................................................................64
Overview ..........................................................................................................66
Register Description ........................................................................................66
Overview ..........................................................................................................71
Ports as General Digital I/O .............................................................................72
Alternate Port Functions ..................................................................................77
Register Description ........................................................................................90
7674F–AVR–09/09