Event Meaning Consequence
EPT_RESTART_POWER_TRANSFER
The Rx asked to restart power transfer
by EPT/rst packet.
Return to ping phase.
EPT_UNKNOWN
The Rx asked to stop power transfer by
EPT/null packet. The Rx does not find
any of the above reasons appropriate
Return to ping phase.
EPT_RECEIVED
The Rx asked to stop power transfer by
EPT packet. The EPT reason is other
than listed above.
Stop the power transfer. Stop
pinging until the object (Rx) is
removed from the Tx coil.
ENTER_POWER_TRANSFER Device in BPP power transfer. Power transfer started.
BAD_PACKET_RECEIVED Bad checksum of identification packet. Return to ping phase.
HANDLER_ERROR Internal error Device stops its operation.
ENTER_CALIBRATION
Starting the calibration for the purpose of
FOD.
The device waits for RP/1 and
RP/2 packets.
ENTER_POWER_TRANSFER_AT_FAST_RATE Starting the EPP power transfer. Fast charging started.
PRESDET_CAL_DONE
Calibration for presence detection
finished (analog ping)
Values saved to NVM.
QFACTOR_CAL_DONE
Calibration for Q factor measurement
finished (Q FOD)
Values saved to NVM.
FOD_DURING_POWER
Power balance FOD triggered. The
system suspects the presence of foreign
object between the coils.
Stop the power transfer. If
repeated 3 times, stop pinging
until the object (Rx) is removed
from the Tx coil.
BPP_QFOD
Low Q factor detected with low power
Rx. Suspect foreign object between Rx
Tx coils.
Stop the power transfer. If
repeated 3 times, stop pinging
until the object (Rx) is removed
from the Tx coil.
OBJECT_REMOVED
All detectable objects (Rx, FO) removed
from the Tx coil.
The device can start pinging
again.
ENTER_POWER_LIMITATION
The power limiter is activated if there is a
VIN drop.
Tx ignores positive CE and fixes
regulation target at 86% of
actual bridge current.
LEAVE_POWER_LIMITATION
Power limitation no longer needed. Either
negative CE received or Tx input power
higher than at the moment of limiter
activation (power source giving more
power).
Tx regulates again according to
CE from Rx.
ENTER_CURRENT_LIMITER
Current is higher than the configured
overcurrent threshold.
Tx ignores positive CE.
LEAVE_CURRENT_LIMITER
Current limitation is no longer needed.
Negative CE received.
Tx regulates again according to
CE from Rx.
OVERLOAD_DETECTED Overload threshold exceeded.
Stop power transfer, return to
ping phase.
SCHEDULER_MSG_ERROR Internal error.
SCHEDULER_TIMER_ERROR Internal error. Stop the firmware.
SENSING_MUX_ERROR Internal error.
NTC_OVERTEMP_DETECTED
Temperature measured by NTC
exceeded the NtcHigh threshold.
Stop power transfer. Do not ping
until the temperature falls below
the NtcLow threshold.
FOD_DURING_NEGOTIATION
The measured Qfactor value differs too
much from value in FOD status packet of
EPP Rx.
Stop the power transfer. If
repeated 3 times, stop pinging
until the object (Rx) is removed
from the Tx coil.
PWR_SRC_ERROR Failed to set proper power source mode. Stop the firmware.
UM3286
Graphical user interface (GUI)
UM3286 - Rev 1
page 31/84
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