ATmega1281 Atmel Corporation, ATmega1281 Datasheet - Page 39

• Manufacturer Part Number: ATmega1281
• Manufacturer: Atmel Corporation

Specifications of ATmega1281

• Flash (kbytes): 128 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 17
• Usb Speed: No
• Usb Interface: No
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 6
• Output Compare Channels: 16
• Input Capture Channels: 2
• Pwm Channels: 8
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

12.12 Rev. 2549C-09/05
12.13 Rev. 2549B-05/05
12.14 Rev. 2549A-03/05
2549NS–AVR–05/11
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Updated Speed Grade in section
Added
Updated
clock must be larger than 2 CPU cycles.
Updated
Updated
Updated
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JTAG ID/Signature for ATmega640 updated: 0x9608.
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Updated
Initial version.
“Resources” on page
“SPI – Serial Peripheral Interface” on page
“Bit Rate Generator Unit” on page
“Maximum speed vs. V
“Ordering Information” on page
“Packaging Information” on page
“Errata” on page
Table 13-7 on page
“Serial Programming Instruction set” on page
“Errata” on page
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29.
ATmega640/1280/1281/2560/2561
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81.
CC
“Features” on page
” on page
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25. Package 64M1 replaced by 64M2.
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195. In Slave mode, low and high period SPI
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