Revision 4

Revision 4 of SAM D20 Xplained Pro is the initial released version.

Known issues

• PTC in self-capacitance mode

  Revision B of the SAM D20 is mounted on this kit. The two lowest gain settings are not selectable and an attempt by the QTouch Library to set enable of these may result in a higher sensitivity than optimal for the sensor. The PTC will not detect all touches. This errata does not affect mutual-capacitance mode which operates as specified.

  Fix/Workaround:

  • Use SAM D20 revision C or later for self-capacitance capacitive touch sensing. These are mounted on revision 5 or later of the SAM D20 Xplained Pro kit.

• VDD_CORE decoupling capacitor

  The VDDC_CORE output pin on SAMD20J18A has two decoupling capacitors, one 100nF and one 4.7μF. This might lead to a high power consumption when leaving STANDBY sleep mode and the regulator returns to normal operating mode.

  Fix/Workaround:

  • Change the 4.7μF tantalum capacitor (C315) to 1μF ceramic capacitor.