\ \ port definitions for Atmegas as found on the Arduino Standard \ Atmega168, Atmega328p \ decimal }; PORTD 2 portpin: digital.0 PORTD 3 portpin: digital.1 PORTD 1 portpin: digital.2 PORTD 0 portpin: digital.3 PORTD 4 portpin: digital.4 PORTC 6 portpin: digital.5 PORTD 7 portpin: digital.6 PORTE 6 portpin: digital.7 PORTB 4 portpin: digital.8 PORTB 5 portpin: digital.9 PORTB 6 portpin: digital.10 PORTB 7 portpin: digital.11 PORTD 6 portpin: digital.12 PORTC 7 portpin: digital.13 PORTB 3 portpin: digital.14 PORTB 1 portpin: digital.15 PORTB 2 portpin: digital.16 PORTB 0 portpin: digital.17 PORTF 7 portpin: digital.18 PORTF 6 portpin: digital.19 PORTF 5 portpin: digital.20 PORTF 4 portpin: digital.21 PORTF 1 portpin: digital.22 PORTF 0 portpin: digital.23 PORTD 4 portpin: digital.24 PORTD 7 portpin: digital.25 PORTB 4 portpin: digital.26 PORTB 5 portpin: digital.27 PORTB 6 portpin: digital.28 PORTD 6 portpin: digital.29 PORTD 5 portpin: TXLED PORTB 0 portpin: RXLED PORTE 2 portpin: HWB \ some digital ports have an alternative use \ synonym is available since amforth 5.0 synonym SPI:SS digital.17 synonym SPI:MOSI digital.16 synonym SPI:MISO digital.14 synonym SPI:SCK digital.15 synonym TWI:SDA digital.2 synonym TWI:SCL digital.3 synonym SERIAL:RX digital.0 synonym SERIAL:TX digital.1 synonym LED_BUILTIN digital.13 synonym analog.0 digital.18 synonym analog.1 digital.19 synonym analog.2 digital.20 synonym analog.3 digital.21 synonym analog.4 digital.22 synonym analog.5 digital.23 synonym analog.6 digital.24 synonym analog.7 digital.25 synonym analog.8 digital.26 synonym analog.9 digital.27 synonym analog.10 digital.28 synonym analog.11 digital.29