ATMEGA645A-AU Atmel, ATMEGA645A-AU Datasheet - Page 675

• Manufacturer Part Number: ATMEGA645A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA645A-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, 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

8285B–AVR–03/11
ATmega165A/165PA/325A/325PA/3250A/3250PA/6
14 8-bit Timer/Counter0 with PWM ............................................................ 94
15 16-bit Timer/Counter1 .......................................................................... 109
16 Timer/Counter0 and Timer/Counter1 Prescalers .............................. 137
17 8-bit Timer/Counter2 with PWM and Asynchronous Operation ...... 140
13.1Overview ...............................................................................................................68
13.2Ports as General Digital I/O ...................................................................................69
13.3Alternate Port Functions ........................................................................................74
13.4Register Description ..............................................................................................90
14.1Features ................................................................................................................94
14.2Overview ...............................................................................................................94
14.3Timer/Counter Clock Sources ...............................................................................95
14.4Counter Unit ..........................................................................................................95
14.5Output Compare Unit ............................................................................................96
14.6Compare Match Output Unit ..................................................................................98
14.7Modes of Operation ...............................................................................................99
14.8Timer/Counter Timing Diagrams .........................................................................103
14.9Register Description ............................................................................................105
15.1Features ..............................................................................................................109
15.2Overview .............................................................................................................109
15.3Accessing 16-bit Registers ..................................................................................111
15.4Timer/Counter Clock Sources .............................................................................114
15.5Counter Unit ........................................................................................................115
15.6Input Capture Unit ...............................................................................................116
15.7Output Compare Units .........................................................................................118
15.8Compare Match Output Unit ................................................................................119
15.9Modes of Operation .............................................................................................121
15.10Timer/Counter Timing Diagrams .......................................................................128
15.11Register Description ..........................................................................................130
16.1Prescaler Reset ...................................................................................................137
16.2Internal Clock Source ..........................................................................................137
16.3External Clock Source .........................................................................................137
16.4Register Description ............................................................................................139
17.1Features ..............................................................................................................140
17.2Overview .............................................................................................................140
17.3Timer/Counter Clock Sources .............................................................................141
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