4.4 Kit Modifications

SAMC21N Xplained Pro has several resistors and jumpers that can be removed/cut to disconnect I/O pins of the ATSAMC21N18A from connectors and on-board ICs and to disconnect/measure power to different sections.

Table 4-27. Resistors
Designator	From	To	Comment
R313	PA14	Arduino shield D3	Remove when using external crystal
R314	PA15	Arduino Shield D5	Remove when using external crystal
R609	RESETN	RESET NET	Remove to disconnect the RESETN pin from the reset system
R607	PB11 RX	CDC RX	Remove to disconnect pins from the EDBG level shifters
R610	RESET NET	EDBG RESET
R611	PA31 SWDIO	EDBG SWDIO
R612	PA30 SWCLK	EDBG SWCLK
R614	PC12 MISO	EDBG MISO
R618	PB12	EDBG GPIO0
R619	PA22	EDBG GPIO1
R620	PC24	EDBG GPIO2
R621	PA28	EDBG GPIO3
R800	RESETN	Arduino shield RESET	Remove to disconnect the reset system from the Arduino shield connectors

Table 4-28. Jumpers
Designator	From	To	Comment
J101	VCC_TARGET_X_P3V3_P5V0	VCC_MCU_P3V3_P5V0	Remove this jumper (JS100) to measure current to the MCU section
J102	VCC_P5V0 (pin 1) and VCC_P3V3 (pin 3)	VCC_TARGET_SWITCH_P3V3_P5V0	Use this jumper (JS101) to select either 5.0V or 3.3V voltage to the Target section. Default setting in production is 5.0V.
J103	VCC_IN_P5V0	VCC_P5V0	Cut this jumper to measure current from the 5.0V input MUX section. The footprint is 0603 sized.
J104	VCC_P3V3_TARGET	VCC_P3V3	Cut this jumper to measure current to the Target and MCU sections. The footprint is 0603 sized.
J105	3.3V linear regulator output for EDBG section	VCC_EDBG_P3V3	Cut this jumper to measure current to the EDBG section. The footprint is 0603 sized.
J106	VCC_TARGET_X_P3V3_P5V0	VCC_TARGET_P3V3_P5V0	Cut this jumper to measure current to the Target section. The footprint is 0603 sized.
J300	PA15_XOUT	16MHz crystal pin	Cut this jumper and mount resistors to find 16MHz crystal oscillator safety factor. The footprint is 0603 sized.
J501	LIN signal	Pull-up resistor to VS voltage	Mount this jumper (JS501) to set the LIN transceiver as Master node. Default setting in production is mounted.
J502	VS_LIN	VCC_TARGET_P3V3_P5V0	Mount this jumper (JS500) to power the LIN transceiver from VCC_TARGET_P3V3_P5V0. Remove this jumper when the LIN transceiver is powered from the LIN bus. Default setting in production is mounted.
J504	CAN0 device, Standby pin	GND	Cut this jumper to explore the standby functionality of the CAN 0 transceiver (ATA6561). The footprint is 0603 sized.
J506	CAN1 device, Standby pin	GND	Cut this jumper to explore the standby functionality of the CAN 1 transceiver (ATA6561). The footprint is 0603 sized.