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

• Manufacturer Part Number: ATMEGA649-16MU
• Description: IC AVR MCU FLASH 64K 64-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649-16MU

• 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: 64-MLF®, 64-QFN
• Processor Series: ATMEGA64x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART, USI
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• For Use With: ATSTK600-TQFP64 - STK600 SOCKET/ADAPTER 64-TQFP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• 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