UM2301
GUI
and evaluation procedure
DocID031141 Rev 1
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Figure 40: STSW-STWBCGUI: CAB file patch button
5.1
Status LEDs
The status LEDs give the state of the charge:
At startup
Red short blinking: when the board auto-calibration is on-going. The user has to wait
for the LED to be switched off before putting a receiver on the surface.
Red and green blinking once: an internal reset occurred.
Red and green steady state: firmware/STWBC chip mismatch
Red steady and after 2 seconds green steady state: board hardware subversion
detected does not match the firmware
In steady state
Green blinking: power transfer in progress
Green steady state: the charge is complete
Red blinking: an error has been detected, as incomplete charge due to battery fault,
overvoltage, overcurren
t
, etc.
Red steady state: the transmitter is stuck until the receiver is removed, as mentioned
in the Qi standard (power transfer stopped three times in a row due to the amount of
power not provided to the receiver, some types of end power transfer or no response
error code)
5.2
Test procedure for board calibration
There are 2 auto-calibration phases in the GUI: one for the presence detection and one for
the QFOD.
Both calibrations are mandatory to ensure a good functioning of the transmitter
board.
