ATMEGA649-16MUR Atmel, ATMEGA649-16MUR Datasheet - Page 386

• Manufacturer Part Number: ATMEGA649-16MUR
• Description: MCU AVR 64KB FLASH 16MHZ 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649-16MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ii
ATmega329/3290/649/6490
9
10 System Control and Reset .................................................................... 41
11 Interrupts ................................................................................................ 49
12 External Interrupts ................................................................................. 54
13 I/O-Ports .................................................................................................. 59
Power Management and Sleep Modes ................................................. 35
8.7
8.8
8.9
8.10
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.10
11.1
11.2
12.1
12.2
13.1
13.2
13.3
Clock Output Buffer .........................................................................................31
Timer/Counter Oscillator ..................................................................................32
System Clock Prescaler ..................................................................................32
Register Description ........................................................................................32
Idle Mode .........................................................................................................36
ADC Noise Reduction Mode ............................................................................36
Power-down Mode ...........................................................................................36
Power-save Mode ............................................................................................36
Standby Mode .................................................................................................37
Power Reduction Register ...............................................................................37
Minimizing Power Consumption ......................................................................37
Register Description ........................................................................................39
Resetting the AVR ...........................................................................................41
Reset Sources .................................................................................................41
Power-on Reset ...............................................................................................42
External Reset .................................................................................................43
Brown-out Detection ........................................................................................43
Watchdog Reset ..............................................................................................44
Internal Voltage Reference ..............................................................................44
Watchdog Timer ..............................................................................................45
Timed Sequences for Changing the Configuration of the Watchdog Timer ....47
Register Description ........................................................................................47
Interrupt Vectors in ATmega329/3290/649/6490 .............................................49
Register Description ........................................................................................52
Pin Change Interrupt Timing ............................................................................54
Register Description ........................................................................................55
Introduction ......................................................................................................59
Ports as General Digital I/O .............................................................................60
Alternate Port Functions ..................................................................................65
2552K–AVR–04/11