Table 4-19 LIN Transceiver
SAM C21 pin Function ATA663211 function Shared functionality
PA06 SERCOM0 PAD[2] LIN
TX
LIN TXD -
PA07 SERCOM0 PAD[3] LIN
RX
LIN RXD -
PB22 GPIO LIN EN -
Table 4-20 LIN Header
LIN header pin Function
1 VS
2 GND
3 LIN
Table 4-21 Master Node Pull-up Enable Header
LIN header pin Function
1 LIN
2 1kΩ pull-up to VS
Table 4-22 LIN VCC Power
LIN header pin Function
1 VS
2 VCC_TARGET_P3V3_P5V0
4.3.6. QTouch Button
There is one self capacitance button available on the SAM C21 Xplained Pro board that can be used as
I/O. This QTouch button is intended to be driven by the built-in Peripheral Touch Controller (PTC) of the
device.
Note: To get started with QTouch, refer to Atmel QTouch Library and Atmel QTouch Composer.
Table 4-23 QTouch Connection
SAM C21 pin Silkscreen text
PA05 QT BTN1
4.3.7. Crypto Footprints
Several of the Atmel security devices, including CryptoAuthentication devices like the ATECC108A,
requires only an I
2
C interface to work, and they share the same packages and pinouts. SAM C21
Xplained Pro has implemented SOIC8 and UDFN8 footprints for these devices so the user may solder
them on themselves. Table 4-24 Crypto Footprints on page 22 shows all the connections between the
footprints and the ATSAMC21J18A.
Atmel SAM C21 Xplained Pro [USER GUIDE]
Atmel-42460C-SAM C21 Xplained Pro_User Guide-10/2015
21
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