Another combined operation mode is the “one shot pulse mode”. In this mode it is possible to output a pulse on a pin with a selectable delay pulse width selectable by the master. This means the pulse will be output after a specific delay. The last combined mode is where not just two channels of the TAU, but even more channels, can be connected together; this is the “multiple PWM output” mode. In this case one master is used to select the period of all the PWM signals and each channel is able to generate a different PWM with a specific duty cycle. All the PWMs in multiple PWM mode run completely synchronously because the trigger of the master is used to start all of the slave channels. A special timer function is used for LIN-bus support and this only uses channel 7 of the TAU0. It can be used to detect a wake-up signal and a Sync Break Field in the LIN protocol and thus measure the pulse width of the sync field. All this is supported in hardware, with the receive pin of the UART directly connected to the timer input of the Timer Array Unit.