ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 709

• 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
26 Boot Loader Support – Read-While-Write Self-Programming ......... 295
27 Memory Programming ......................................................................... 311
28 Electrical Characteristics .................................................................... 345
29 Typical Characteristics ........................................................................ 360
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
25.7Boundary-scan Description Language Files ........................................................293
25.8Register Description ............................................................................................294
26.1Features ..............................................................................................................295
26.2Overview .............................................................................................................295
26.3Application and Boot Loader Flash Sections .......................................................295
26.4Read-While-Write and No Read-While-Write Flash Sections ..............................296
26.5Boot Loader Lock Bits .........................................................................................298
26.6Entering the Boot Loader Program ......................................................................300
26.7Addressing the Flash During Self-Programming .................................................300
26.8Self-Programming the Flash ................................................................................301
26.9Register Description ............................................................................................308
27.1Program And Data Memory Lock Bits .................................................................311
27.2Fuse Bits .............................................................................................................312
27.3Signature Bytes ...................................................................................................314
27.4Calibration Byte ...................................................................................................314
27.5Page Size ............................................................................................................314
27.6Parallel Programming Parameters, Pin Mapping, and Commands .....................315
27.7Parallel Programming ..........................................................................................317
27.8Serial Downloading .............................................................................................326
27.9Programming via the JTAG Interface ..................................................................332
28.1Absolute Maximum Ratings* ...............................................................................345
28.2DC Characteristics ..............................................................................................345
28.3Speed Grades .....................................................................................................352
28.4Clock Characteristics ...........................................................................................353
28.5System and Reset Characteristics ......................................................................354
28.6Power-on Reset ...................................................................................................354
28.7Brown-out Detection ............................................................................................355
28.8SPI Timing Characteristics ..................................................................................356
28.9ADC Characteristics – Preliminary Data ..............................................................358
28.10LCD Controller Characteristics ..........................................................................359
Boundary-scan Order 273
vi