Revision 2 of the kit has a start-up problem when
target voltage is set to 3.3V. When the EDBG opens
the target voltage power switch from
VCC_TARGET_SWITCH_P3V3_P5V0 to
VCC_TARGET_P3V3_P5V0 a power surge is observed.
This power surge causes the VCC_P3V3 nets voltage
to decrease enough to trigger the EDBGs BOD,
resulting in the EDBG entering a locked state
where it can not be used.
- Fix/Workaround:
- Use the kit with 5.0V selected as the target
voltage.
- Force the target voltage switch open by
connecting Q102 pin 2 to GND.
Important: Forcing the target voltage switch open will disable any protection for Xplained Pro extension
modules connected to EXT1, EXT2, and EXT3. Make sure that connected extensions supports the
selected target voltage.