18.3.2 Local Wake-up Through LIN_WKIN Pin

A falling edge at the LIN_WKIN pin followed by a low level maintained for a certain period of time (>t_WKin) results in a local wake-up request and the device switches to Fail-Safe mode. The LIN_INH pin is activated (switches to V_S) and the internal Responder termination resistor is switched on. The local wake-up request is indicated by a low level at the LIN_TXD pin and a high level at the LIN_RXD pin, generating an interrupt for the microcontroller. Even when the LIN_WKIN pin is low, it is possible to switch to Sleep mode via the LIN_EN pin. In this case, the wake-up signal has to be switched to high >10 µs before the negative edge at LIN_WKIN starts a new local wake-up request.