Xplained Pro Extension Headers

The SAM B11 Xplained Pro headers EXT1 and EXT3 offers access to the I/O of the microcontroller in order to expand the board e.g., by connecting extensions to the board. These headers are based on the standard extension header specified in Table 1 . The headers have a pitch of 2.54mm

Table 1. Extension Header EXT1
EXT1 pin SAM B11 pin Function Shared functionality
1 [ID] - - Communication line to the ID chip on an extension board
2 [GND] - - Ground
3 [ADC(+)] GPIO_MS1 ADC  
4 [ADC(-)] GPIO_MS2 ADC  
5 [GPIO1] GPIO4 GPIO EDBG SPI
6 [GPIO2] AO_GPIO_2 GPIO/IRQ  
7 [PWM(+)] - -  
8 [PWM(-)] - -  
9 [IRQ/GPIO] AO_GPIO_0 IRQ/GPIO  
10 [SPI_SS_B/GPIO] GPIO_5 GPIO Temperature Sensor
11 [TWI_SDA] LP_GPIO_8 I²C SDA EDBG I²C, Temperature Sensor
12 [TWI_SCL] LP_GPIO_9 I²C SCL EDBG I²C, Temperature Sensor
13 [USART_RX] LP_GPIO_2 UART1 RXD  
14 [USART_TX] LP_GPIO_3 UART TXD  
15 [SPI_SS_A] LP_GPIO_12 SPI_SSN  
16 [SPI_MOSI] LP_GPIO_11 SPI MOSI EDBG SPI
17 [SPI_MISO] LP_GPIO_13 SPI MISO EDBG SPI
18 [SPI_SCK] LP_GPIO_10 SPI SCK EDBG SPI
19 [GND] - - Ground
20 [VCC] - - Power for extension board
Table 2. Extension Header EXT3
EXT3 pin SAM B11 pin Function Shared functionality
1 [ID] - - Communication line to the ID chip on an extension board
2 [GND] - - Ground
3 [ADC(+)] GPIO_MS3 ADC  
4 [ADC(-)] GPIO_MS4 ADC  
5 [GPIO1] LP_GPIO_20 GPIO EDBG GPIO3
6 [GPIO2] - -  
7 [PWM(+)] - -  
8 [PWM(-)] - -  
9 [IRQ/GPIO] AO_GPIO_1 IRQ/GPIO  
10 [SPI_SS_B/GPIO] - -  
11 [TWI_SDA] LP_GPIO_14 I²C SDA DEBUG I²C
12 [TWI_SCL] LP_GPIO_15 I²C SCL DEBUG I²C
13 [USART_RX] LP_GPIO_6 UART2 RX DEBUG UART
14 [USART_TX] LP_GPIO_7 UART2 TX DEBUG UART
15 [SPI_SS_A] LP_GPIO_16 SPI1 SSN  
16 [SPI_MOSI] LP_GPIO_19 SPI1 MOSI  
17 [SPI_MISO] LP_GPIO_18 SPI1 MISO  
18 [SPI_SCK] LP_GPIO_17 SPI1 SCK  
19 [GND] - - Ground
20 [VCC] - - Power for extension board
Parent topic: Connectors