CPU
CPUCPU Registers
Registers
GPIOR00x3EGPIOR10x4AGPIOR20x4BSMCR0x53MCUSR0x54MCUCR0x55RAMPZ0x5BSP0x5DSREG0x5FCLKPR0x61PRR00x64PRR10x65OSCCAL0x66XMCRA0x74XMCRB0x75
ATmega1281 peripherals
Each block of the ATmega1281: what it is, the registers that control it and the pins it uses.
PORTA
PORTI/O Port
Registers
PORTB
PORTI/O Port
Registers
PORTC
PORTI/O Port
Registers
PORTD
PORTI/O Port
Registers
PORTE
PORTI/O Port
Registers
PORTF
PORTI/O Port
Registers
PORTG
PORTI/O Port
Registers
EXINT
EXINTExternal Interrupts
Registers
Pins
TC0
TC8Timer/Counter, 8-bit
Registers
Pins
TC1
TC16Timer/Counter, 16-bit
Registers
Pins
TC2
TC8_ASYNCTimer/Counter, 8-bit Async
Registers
Pins
TC3
TC16Timer/Counter, 16-bit
Registers
Pins
TC4
TC16Timer/Counter, 16-bit
Registers
TC5
TC16Timer/Counter, 16-bit
Registers
USART0
USARTUSART
Registers
Pins
USART1
USARTUSART
Registers
Pins
SPI
SPISerial Peripheral Interface
Registers
Pins
TWI
TWITwo Wire Serial Interface
Registers
Pins
ADC
ADCAnalog-to-Digital Converter
Registers
Pins
AC
ACAnalog Comparator
Registers
Pins
EEPROM
EEPROMEEPROM
Registers
WDT
WDTWatchdog Timer
Registers
JTAG
JTAGJTAG Interface