ATmega1280 Atmel Corporation, ATmega1280 Datasheet - Page 94

• Manufacturer Part Number: ATmega1280
• Manufacturer: Atmel Corporation

Specifications of ATmega1280

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 86
• Ext Interrupts: 32
• Usb Speed: No
• Usb Interface: No
• Spi: 5
• Twi (i2c): 1
• Uart: 4
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• 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: 4
• Pwm Channels: 15
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

13.3.9
2549N–AVR–05/11
Alternate Functions of Port J
Table 13-26. Overriding Signals for Alternate Functions in PH3:PH0
The Port J alternate pin configuration is as follows:
Table 13-27. Port J Pins Alternate Functions
• PCINT15:12 - Port J, Bit 6:3
PCINT15:12, Pin Change Interrupt Source 15:12. The PJ6:3 pins can serve as External Interrupt
Sources.
• XCK2/PCINT11 - Port J, Bit 2
XCK2, USART 2 External Clock. The Data Direction Register (DDJ2) controls whether the clock
is output (DDJ2 set) or input (DDJ2 cleared). The XCK2 pin is active only when the USART2
operates in synchronous mode.
PCINT11, Pin Change Interrupt Source 11. The PJ2 pin can serve as External Interrupt
Sources.
Signal Name
DIEOE
DIEOV
Port Pin
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
AIO
DI
PJ7
PJ6
PJ5
PJ4
PJ3
PJ2
PJ1
PJ0
OC4A ENABLE
PH3/OC4A
OC4A
XCK3/PCINT11 (USART3 External Clock or Pin Change Interrupt 11)
0
0
0
0
–
0
0
0
–
TXD3/PCINT10 (USART3 Transmit Pin or Pin Change Interrupt 10)
RXD3/PCINT9 (USART3 Receive Pin or Pin Change Interrupt 9)
ATmega640/1280/1281/2560/2561
XCK2 OUTPUT
XCK2 OUTPUT
PCINT15 (Pin Change Interrupt 15)
PCINT14 (Pin Change Interrupt 14)
PCINT13 (Pin Change Interrupt 13)
PCINT12 (Pin Change Interrupt 12)
XC2K INPUT
PH2/XCK2
ENABLE
ENABLE
XCK2
0
0
1
–
0
0
–
Alternate Function
–
PH1/TXD2
TXEN2
TXEN2
TXEN2
TXD2
0
1
–
0
0
0
–
PORTH0 • PUD
PH0/RXD2
RXEN2
RXEN2
RXD2
0
0
0
–
0
0
–
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