Mikroe mikromedia 3, User Manual

Page: 14 / 32

P A G E 14
mikromedia 3 for PIC32MZ CAPACITIVE U S E R M A N U A L
PO
WER SUPPL
Y
2.4 Power redundancy and
uninterrupted power supply (UPS)
2.5 Powering up the
mikromedia 3 board
The PSU module supports power supply redundancy: it will automatically
switch to the most appropriate power source if one of the power sources
fails or becomes disconnected. The power supply redundancy also allows
for an uninterrupted operation (i.e. UPS functionality, the battery will still
provide power if the USB cable is removed, without resetting mikromedia 3
during the transition period).
After a valid power supply source is connected in our case with a single-
cell Li-Po/Li-Ion battery
(1) , mikromedia 3 can be powered ON. This can
be done by a small switch at the edge of the board, labeled as SW1 (2) .
By switching it ON, the PSU module will be enabled, and the power will be
distributed throughout the board. A LED indicator labeled as PWR indicates
that the mikromedia 3 is powered ON.