Hardware User Guide; Connectors; I/O Extension Headers - Atmel SAMDA1 Xplained Pro User Manual

4.

Hardware User Guide

4.1

Connectors

This chapter describes the implementation of the relevant connectors and headers on SAMDA1 Xplained Pro
and their connection to the
between the headers and on-board functionality.
4.1.1

I/O Extension Headers

The SAMDA1 Xplained Pro headers EXT1, EXT2 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 all comply with the
standard extension header specified in
mm.
Pin on EXT1
1. [ID]
2. [GND]
3. [ADC(+)]
4. [ADC(-)]
5. [GPIO1]
6. [GPIO2]
7. [PWM(+)]
8. [PWM(-)]
9. [IRQ/GPIO]
10. [SPI_SS_B/GPIO]
11. [TWI_SDA]
12. [TWI_SCL]
13. [USART_RX]
14. [USART_TX]
15. [SPI_SS_A]
16. [SPI_MOSI]
17. [SPI_MISO]
18. [SPI_SCK]
19. [GND]
20. [VCC]
1 The SERCOM4 module is shared between EXT1, 2 and 3 UART's, but uses different pins on EXT1 and EXT2/3.
2 The SERCOM4 module is shared between EXT1, 2 and 3 UART's, but uses different pins on EXT1 and EXT2/3.
SAMDA1J16A
. The tables of connections in this chapter also describes which signals are shared
Xplained Pro Standard Extension Header on page
Extension Header EXT1
Table 4-1.
SAM DA1
pin Function
-
-
PB00 AIN[8]
PB01 AIN[9]
PB06 GPIO
PB07 GPIO
PB02 TC6/WO[0]
PB03 TC5/WO[1]
PB04 EXTINT[4]
PB05 GPIO
PA08 SERCOM2 PAD[0] I²C SDA
PA09 SERCOM2 PAD[1] I²C SCL
PB09 SERCOM4 PAD[1] UART RX
PB08 SERCOM4 PAD[0] UART TX
PA05 SERCOM0 PAD[1] SPI SS
PA06 SERCOM0 PAD[2] SPI MOSI
PA04 SERCOM0 PAD[0] SPI MISO
PA07 SERCOM0 PAD[3] SPI SCK
- -
- -
9. All headers have a pitch of 2.54
Shared Functionality
ID signal from extension board
GND
EXT2, EXT3 and EDBG
EXT2, EXT3 and EDBG
1
2
GND
VCC
Atmel SAMDA1 Xplained Pro [USERGUIDE] 11