ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 705

• Manufacturer Part Number: ATMEGA649A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649A-AU

• 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: 54
• 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): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8284A–AVR–10/10
9
10 System Control and Reset .................................................................... 47
11 Interrupts ................................................................................................ 56
12 External Interrupts ................................................................................. 61
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
Power Management and Sleep Modes ................................................. 40
8.3Default Clock Source ...............................................................................................31
8.4Calibrated Internal RC Oscillator .............................................................................32
8.5Crystal Oscillator .....................................................................................................32
8.6Low-frequency Crystal Oscillator .............................................................................34
8.7External Clock .........................................................................................................35
8.8Clock Output Buffer .................................................................................................36
8.9Timer/Counter Oscillator .........................................................................................37
8.10System Clock Prescaler ........................................................................................37
8.11Register Description ..............................................................................................38
9.1Overview .................................................................................................................40
9.2Sleep Modes ...........................................................................................................40
9.3BOD Disable
9.4Idle Mode .................................................................................................................41
9.5ADC Noise Reduction Mode ...................................................................................41
9.6Power-down Mode ..................................................................................................41
9.7Power-save Mode ...................................................................................................42
9.8Standby Mode .........................................................................................................42
9.9Power Reduction Register .......................................................................................42
9.10Minimizing Power Consumption ............................................................................43
9.11Register Description ..............................................................................................45
10.1Resetting the AVR .................................................................................................47
10.2Reset Sources .......................................................................................................47
10.3Internal Voltage Reference ....................................................................................51
10.4Watchdog Timer ....................................................................................................51
10.5Register Description ..............................................................................................53
11.1Overview ...............................................................................................................56
11.2Interrupt Vectors ....................................................................................................56
11.3Register Description ..............................................................................................60
12.1Overview ...............................................................................................................61
12.2Pin Change Interrupt Timing .................................................................................62
12.3Register Description ..............................................................................................62
(1)
.........................................................................................................40
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