SAMC21 datasheet(10/46 Pages) ATMEL

10 / 46 page

Embedded Debugger USB.

Info: External power is required when 500mA from a USB connector is not enough to power

the board with possible extension boards.

3.4.

Xplained Pro Headers and Connectors

3.4.1.

Xplained Pro Standard Extension Header

All Xplained Pro kits have one or more dual row, 20-pin, 100mil extension header. Xplained Pro MCU

boards have male headers, while Xplained Pro extensions have their female counterparts. Note that all

pins are not always connected. All connected pins follow the defined pin-out description in the table

below.

The extension headers can be used to connect a variety of Xplained Pro extensions to Xplained Pro MCU

boards or to access the pins of the target MCU on Xplained Pro MCU boards directly.

Table 3-4. Xplained Pro Standard Extension Header

Pin number

Name

Description

Communication line to the ID chip on an extension board

GND

Ground

ADC(+)

Analog to digital converter, alternatively positive part of differential

ADC

ADC(-)

Analog to digital converter, alternatively negative part of differential

ADC

GPIO1

General purpose I/O

GPIO2

General purpose I/O

PWM(+)

Pulse width modulation, alternatively positive part of differential

PWM

PWM(-)

Pulse width modulation, alternatively negative part of differential

PWM

IRQ/GPIO

Interrupt request line and/or general purpose I/O

SPI_SS_B/

GPIO

Slave select for SPI and/or general purpose I/O

I2C_SDA

Data line for I2C interface. Always implemented, bus type.

I2C_SCL

Clock line for I2C interface. Always implemented, bus type.

UART_RX

Receiver line of target device UART

UART_TX

Transmitter line of target device UART

SPI_SS_A

Slave select for SPI. Should preferably be unique.

Atmel SAM C21 Xplained Pro [USER GUIDE]

Atmel-42460D-SAM-C21-Xplained-Pro_User Guide-08/2016

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