If the EN pin is high after the device enters standby init mode, the device enters normal mode. If EN is low, it enters standby mode. In normal operational mode, the receiver and transmitter are active and the LIN transmission up to the LIN specified maximum of 20 kbps is supported. If TXD pin is dominant at the time of entering normal mode the LIN transmitter is kept off until a recessive is applied to TXD. The receiver detects the data stream on the LIN bus and outputs it on RXD for the LIN controller. A recessive signal on the LIN bus is a digital high and a dominant signal on the LIN bus is a digital low. The driver transmits input data from TXD to the LIN bus. Normal mode is entered as EN transitions high while the device is in sleep or standby mode for > t_EN. Once EN has been high for t_EN the device enters normal mode after t_{MODE_CHANGE} and t_NOMINIT.