Multiplexed Signals

Table 1. PORT Function Multiplexing
SOIC 14-Pin Pin Name(1,2) Special ADC0 AC0 USART0 SPI0 TWI0 TCA0 TCB0 CCL
10 PA0 RESET / UPDI AIN0             LUT0-IN0
11 PA1   AIN1   TxD(3) MOSI       LUT0-IN1
12 PA2 EVOUT AIN2   RxD(3) MISO       LUT0-IN2
13 PA3 CLKI AIN3   XCK(3) SCK   WO3    
14 GND              
1 VCC              
2 PA4   AIN4   XDIR(3) SS   WO4   LUT0-OUT
3 PA5   AIN5 OUT       WO5 WO0  
4 PA6   AIN6 AINN0            
5 PA7   AIN7 AINP0           LUT1-OUT
6 PB3       RxD     WO0(3)    
7 PB2 EVOUT     TxD     WO2    
8 PB1   AIN10   XCK   SDA WO1    
9 PB0   AIN11   XDIR   SCL WO0    
Note:
  1. 1.Pins names are of type Pxn, with x being the PORT instance (A, B) and n the pin number. Notation for signals is PORTx_PINn. All pins can be used as event input.
  2. 2.All pins can be used for external interrupt, where pins Px2 and Px6 of each port have full asynchronous detection.
  3. 3.Alternate pin positions. For selecting the alternate positions, refer to the PORTMUX documentation.
Parent topic: I/O Multiplexing and Considerations