ATmega1280 Atmel Corporation, ATmega1280 Datasheet - Page 92

• 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

13.3.8
2549N–AVR–05/11
Alternate Functions of Port H
Table 13-23. Overriding Signals for Alternate Functions in PG3:PG0
The Port H alternate pin configuration is as follows:
Table 13-24. Port H Pins Alternate Functions
• T4 – Port H, Bit 7
T4, Timer/Counter4 counter source.
• OC2B – Port H, Bit 6
OC2B, Output Compare Match B output: The PH6 pin can serve as an external output for the
Timer/Counter2 Output Compare B. The pin has to be configured as an output (DDH6 set) to
serve this function. The OC2B pin is also the output pin for the PWM mode timer function.
• OC4C – Port H, Bit 5
OC4C, Output Compare Match C output: The PH5 pin can serve as an external output for the
Timer/Counter4 Output Compare C. The pin has to be configured as an output (DDH5 set) to
serve this function. The OC4C pin is also the output pin for the PWM mode timer function.
Signal Name
DIEOE
DIEOV
Port Pin
PUOE
DDOE
DDOV
PUOV
PVOE
PVOV
PTOE
AIO
PH7
PH6
PH5
PH4
PH3
PH2
PH1
PH0
DI
T/C2 OSC OUTPUT
AS2 • EXCLK
AS2 • EXCLK
AS2 • EXCLK
PG3/TOSC2
0
0
0
0
–
0
–
OC4C (Output Compare and PWM Output C for Timer/Counter4)
OC2B (Output Compare and PWM Output B for Timer/Counter2)
OC4B (Output Compare and PWM Output B for Timer/Counter4)
OC4A (Output Compare and PWM Output A for Timer/Counter4)
ATmega640/1280/1281/2560/2561
T4 (Timer/Counter4 Clock Input)
XCK2 (USART2 External Clock)
PG2/ALE/A7
TXD2 (USART2 Transmit Pin)
RXD2 (USART2 Receive Pin)
SRE
SRE
SRE
ALE
Alternate Function
0
1
–
0
0
–
–
PG1/RD
SRE
SRE
SRE
RD
0
1
–
0
0
–
–
PG0/WR
SRE
SRE
SRE
WR
0
1
–
0
0
–
–
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