4.4 Kit Modifications

SAM C21 Xplained Pro has several resistors and jumpers that can be removed/cut to disconnect I/O pins of the ATSAMC21J18A from connectors and on-board ICs and to disconnect/measure power to different sections.

Table 4-25. Resistors
DesignatorFromToComment
R313PA14EXT3 pin 7Remove when using external crystal
R314PA15EXT3 pin 8 and LED
R609RESETNRESET NETRemove to disconnect the RESETN pin from the reset system
R607PB11 RXCDC RXRemove to disconnect pins from the EDBG level shifters
R610RESET NETEDBG RESET
R611PA31 SWDIOEDBG SWDIO
R612PA30 SWCLKEDBG SWCLK
R614PB02 MISOEDBG MISO
R618PB12EDBG GPIO0
R619PB16EDBG GPIO1
R620PB17EDBG GPIO2
R621PA28EDBG GPIO3
R800RESETNArduino shield RESETRemove to disconnect the reset system from the Arduino shield connectors
Figure 4-3. Resistors Top
Figure 4-4. Resistors Bottom
Table 4-26. Jumpers
DesignatorFromToComment
J101VCC_TARGET_X_P3V3_P5V0VCC_TARGET_P3V3_P5V0Remove this jumper (JS100) to measure current to the MCU section
J102VCC_IN_P5V0 (pin 1) and VCC_P3V3_TARGET (pin 3)VCC_TARGET_SWITCH_P3V3_P5V0Use this jumper (JS101) to select either 5.0V or 3.3V voltage to the Target section. Default setting in production is 5.0V.
J103VCC_IN_P5V0VCC_P5V0Cut this jumper to measure current from the 5.0V input MUX section. The footprint is 0603 sized.
J1043.3V linear regulator output for EDBG sectionVCC_EDBG_P3V3Cut this jumper to measure current to the EDBG section. The footprint is 0603 sized.
J1053.3V linear regulator output for Target and MCU sectionsVCC_P3V3Cut this jumper to measure current to the Target and MCU sections. The footprint is 0603 sized.
J106VCC_TARGET_X_P3V3_P5V0VCC_TARGET_P3V3_P5V0Cut this jumper to measure current to the Target section. The footprint is 0603 sized.
J300PA15_XOUT16MHz crystal pinCut this jumper and mount resistors to find 16MHz crystal oscillator safety factor. The footprint is 0603 sized.
J501LIN signalPull-up resistor to VS voltageMount this jumper (JS501) to set the LIN transceiver as Master node. Default setting in production is mounted.
J502VS_LINVCC_TARGET_P3V3_P5V0Mount 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.
J504CAN device, Standby pinGNDCut this jumper to explore the standby functionality of the CAN transceiver (ATA6561). The footprint is 0603 sized.
Figure 4-5. Jumpers Top
Figure 4-6. Jumpers Bottom