4.3.1 Xplained Pro Extension Headers

The SAM R34 Xplained Pro Evaluation Kit headers EXT1 and EXT3 offer 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 Xplained Pro Standard Extension Header. The headers have a pitch of 2.54 mm.

Table 4-1. Extension Header EXT1
EXT1SAM R34Shared Functionality
PinSignalPortPin
1ID---
2GND---
3ADC(+)PA06E3-
4ADC(-)PA07F3-
5GPIO1PA08F4EXT3
6GPIO2PA28C6Mechanical Buttons
7PWM(+)PA18E7-
8PWM(-)PA19E8-
9IRQPA22D8-
10SPI_SSPA15G8-
11TWI_SDAPA16F7EXT3
12TWI_SCLPA17E6EXT3
13UART_RXPA05C4Virtual COM Port
14UART_TXPA04D3Virtual COM Port
15SPI_SSPA23D7-
16SPI_MOSIPB22E5EXT3
17SPI_MISOPB02B4EXT3
18SPI_SCKPB23C7EXT3
19GND---
20VCC---
Table 4-2. Extension Header EXT3
EXT3SAM R34Shared Functionality
PinSignalPortPin
1ID---
2GND---
3ADC(+)---
4ADC(-)---
5GPIO1PA27E4-
6GPIO2---
7PWM(+)---
8PWM(-)---
9IRQ---
10SPI_SSPA08F4EXT1
11TWI_SDAPA16F7EXT1
12TWI_SCLPA17E6EXT1
13UART_RX---
14UART_TX---
15SPI_SSPA14F8-
16SPI_MOSIPB22E5EXT1
17SPI_MISOPB02B4EXT1
18SPI_SCKPB23C7EXT1
19GND---
20VCC---