ATmega1281 Atmel Corporation, ATmega1281 Datasheet - Page 90

• 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

13.3.7
2549N–AVR–05/11
Alternate Functions of Port G
Table 13-19. Overriding Signals for Alternate Functions in PF7:PF4
Table 13-20. Overriding Signals for Alternate Functions in PF3:PF0
The Port G alternate pin configuration is as follows:
Table 13-21. Port G Pins Alternate Functions
DIEOE
DIEOV
Signal
PUOE
PUOV
DDOE
DDOV
Name
PVOE
PVOV
AIO
Signal Name
DI
Port Pin
DIEOE
DIEOV
DDOE
PUOE
PUOV
DDOV
PVOE
PVOV
PG5
PG4
PG3
PG2
PG1
PG0
AIO
DI
TDI/ADC7 INPUT
PF7/ADC7/TDI
JTAGEN
JTAGEN
JTAGEN
1
0
0
0
0
–
ADC3 INPUT
PF3/ADC3
OC0B (Output Compare and PWM Output B for Timer/Counter0)
0
0
0
0
0
0
0
0
–
ATmega640/1280/1281/2560/2561
PF6/ADC6/TDO
ALE (Address Latch Enable to external memory)
ADC6 INPUT
SHIFT_IR +
SHIFT_DR
JTAGEN
JTAGEN
JTAGEN
JTAGEN
TOSC1 (RTC Oscillator Timer/Counter2)
TOSC2 (RTC Oscillator Timer/Counter2)
WR (Write strobe to external memory)
RD (Read strobe to external memory)
TDO
0
0
–
ADC2 INPUT
PF2/ADC2
0
0
0
0
0
0
0
0
–
Alternate Function
TMS/ADC5 INPUT
PF5/ADC5/TMS
JTAGEN
JTAGEN
JTAGEN
ADC1 INPUT
PF1/ADC1
1
0
0
0
0
–
0
0
0
0
0
0
0
0
–
TCK/ADC4 INPUT
PF4/ADC4/TCK
ADC0 INPUT
PF0/ADC0
JTAGEN
JTAGEN
JTAGEN
1
0
0
0
0
–
0
0
0
0
0
0
0
0
–
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