Microchip Technology SAMC21N Xplained Pro Manual page 11

Pin Number
9
10
11
12
13
14
15
16
17
18
19
20
3.4.2 Xplained Pro Power Header
The power header can be used to connect external power to the SAMC21N Xplained Pro kit. The kit will
automatically detect and switch to any external power if supplied. The power header can also be used as
supply for external peripherals or extension boards. Care must be taken not to exceed the total current
limitation of the on-board regulator when using the 3.3V or 5.0V pin.
Table 3-5. Xplained Pro Power Header
Pin Number
1
2
3
4
©
2017 Microchip Technology Inc.
Name Description
IRQ/GPIO Interrupt request line and/or general purpose I/O
SPI_SS_B/ Slave select for SPI and/or general purpose I/O
GPIO
2
I C_SDA Data line for I
2
I C_SCL Clock line for I
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.
SPI_MOSI Master out slave in line of serial peripheral interface. Always
implemented, bus type.
SPI_MISO Master in slave out line of serial peripheral interface. Always
implemented, bus type.
SPI_SCK Clock for serial peripheral interface. Always implemented, bus type.
GND Ground
VCC Power for extension board
Pin Name
VEXT_P5V0
GND
VCC_P5V0
VCC_P3V3
SAMC21N Xplained Pro
2
C interface. Always implemented, bus type.
2
C interface. Always implemented, bus type.
Description
External 5V input
Ground
Unregulated 5V (output, derived from one of the input
sources)
Regulated 3.3V (output, used as main power supply for the
kit)
User Guide
DS70005318A-page 11