SAMC21 datasheet(21/46 Pages) ATMEL

21 / 46 page

adding a resistor across the strap. Information about oscillator allowance and safety factor can be found

in appnote AVR4100. Information about clock calibration and compensation can be found in appnote

AT03155.

The footprint for the external crystal is based on the Epson

® TSX-3225 series.

Table 4-15. External 32.768kHz Crystal

SAM C21 pin

Function

Shared functionality

PA00

XIN32

PA01

XOUT32

Table 4-16. External Crystal Footprint

SAM C21 pin

Function

Shared functionality

PA14

XIN

EXT3

PA15

XOUT

EXT3 and User LED

4.3.4.

CAN

ATSAMC21J18A has two CAN modules that performs communication according to ISO11898-1 (Bosch

CAN specification 2.0 part A,B) and Bosch CAN FD specification V1.0.

CAN0 is connected to an on-board ATA6561 CAN physical-layer transceiver. Table 4-17 shows

connections between the ATSAMC21J18A and the ATA6561.

The CAN differential signals are connected to a 1 x 2, 100 mil pin-header labeled CAN.

Table 4-17. ATA6561 Connections

SAM C21pin

Function

ATA6561 function

Shared functionality

PA24

CAN0TX

TXD

PA25

CAN0RX

RXD

Table 4-18. CAN Header

CAN header pin

Function

CANH

CANL

4.3.5.

LIN

An ATA663211 LIN transceiver is mounted on the kit to convert the LIN signals from the SERCOM

module in the SAM C21 device. The LIN compatible signals are available at a 3-pin header.

Atmel SAM C21 Xplained Pro [USER GUIDE]

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

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