Power Header; Gpio Header - Atmel I/O1 Xplained Pro User Manual

Pin Function
on
EXT
11 TWI SDA
12 TWI SCL
13 UART RX
14 UART TX
15 microSD_SS
16 SPI_MOSI
17 SPI_MISO
18 SPI_SCK
19 GND
20 VCC
4.2.2.

Power Header

The two pin power header on IO1 Xplained Pro can be used together with the GPIO pins to connect
external circuitry or probe the voltage on the board. The pins of the header are marked in silk screen with
VTG for target voltage and GND for ground.
Info: The two pin power header should not be used to apply power to I/O1 Xplained Pro when
connected to an Xplained Pro MCU board as it will get power from the Xplained Pro MCU board
through the 20-pin extension connector.
Table 4-3 Power Header
Silk screen marking
VTG
GND
4.2.3.

GPIO Header

I/O1 Xplained Pro features a 2-pin header with access to the two generic GPIO lines on the 20-pin
extension connector. These lines are routed from the 20-pin extension header through 39Ω series
resistors to the 2-pin GPIO header.
Description
Data line of TWI interface, connected to SDA pin (Pin 1) of temperature
sensor chip
Clock line of TWI interface, connected to SCL pin (Pin 2) of temperature
sensor chip
Receive pin of target MCU UART interface
Transmit pin of target MCU UART interface
Chip select signal, connected to DAT3 pin on microSD card connector
Master Out, Slave In signal of target MCU SPI interface. Connected to
CMD pin on microSD card connector.
Master In, Slave Out signal of target MCU SPI interface. Connected to D0
pin on microSD card connector.
Clock line of SPI interface. Connected to CLK pin on microSD card
connector.
Ground
Target supply voltage
Description
Target voltage, main voltage of the I/O1 Xplained Pro extension board
Ground
Atmel I/O1 Xplained Pro [USER GUIDE]
Atmel-42078B-IO1-Xplained-Pro_User Guide-10/2015
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