ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 707

• 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
18 SPI – Serial Peripheral Interface ......................................................... 166
19 USART0 ................................................................................................. 176
20 USI – Universal Serial Interface .......................................................... 204
21 Analog Comparator ............................................................................. 216
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
17.3Timer/Counter Clock Sources .............................................................................148
17.4Counter Unit ........................................................................................................149
17.5Output Compare Unit ..........................................................................................149
17.6Compare Match Output Unit ................................................................................151
17.7Modes of Operation .............................................................................................152
17.8Timer/Counter Timing Diagrams .........................................................................156
17.9Asynchronous Operation of Timer/Counter2 .......................................................158
17.10Register Description ..........................................................................................161
18.1Features ..............................................................................................................166
18.2Overview .............................................................................................................166
18.3SS Pin Functionality ............................................................................................171
18.4Data Modes .........................................................................................................171
18.5Register Description ............................................................................................173
19.1Features ..............................................................................................................176
19.2Overview .............................................................................................................176
19.3Clock Generation .................................................................................................178
19.4Frame Formats ....................................................................................................181
19.5USART Initialization ............................................................................................182
19.6Data Transmission – The USART Transmitter ....................................................184
19.7Data Reception – The USART Receiver .............................................................186
19.8Asynchronous Data Reception ............................................................................190
19.9Multi-processor Communication Mode ................................................................193
19.10Examples of Baud Rate Setting ........................................................................195
19.11Register Description ..........................................................................................199
20.1Features ..............................................................................................................204
20.2Overview .............................................................................................................204
20.3Functional Descriptions .......................................................................................205
20.4Alternative USI Usage .........................................................................................211
20.5Register Description ............................................................................................212
21.1Overview .............................................................................................................216
21.2Analog Comparator Multiplexed Input .................................................................216
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