5.11.1 LIN REMOTE WAKE-UP
(Submit Feedback)Depending on the setting of the LINWUE bit (LIN bus wake-up event detection enable, see WUCR
Register), the LIN bus wake-up capability is activated or
deactivated. If the bit is set to ‘1’, a LIN bus voltage level
below the LIN driver dominant threshold will activate the internal LIN receiver
and start the wake-up detection timer.
A dominant bus level maintained for a certain duration (> tbus) and the following
rising edge at the LIN pin result in a remote wake-up request. If a valid LIN bus
wake-up is detected, the LINWU register bit will be set to ‘1’. A
strong pull-up current between VS and LIN is activated to stabilize the recessive
output voltage at the LIN pin.
The event will be signaled to a microcontroller via the NIRQ pin. The strong pull-up current will be switched OFF again when the LIN transceiver switches into LIN Standby mode and the LINWU bit is reset by the microcontroller.