CPU
CPUCPU Registers
Registers
GPIOR00x3EGPIOR10x4AGPIOR20x4BSMCR0x53MCUSR0x54MCUCR0x55SPMCSR0x57SP0x5DSREG0x5FCLKPR0x61PRR0x64OSCCAL0x66
ATmega168PA peripherals
Each block of the ATmega168PA: what it is, the registers that control it and the pins it uses.
PORTB
PORTI/O Port
Registers
PORTC
PORTI/O Port
Registers
PORTD
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
USART0
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