Slave circuit of a LIN bus and method for operation

摘要

A slave circuit of a LIN bus and method for operating a slave circuit is provided. The slave circuit includes a receiver circuit that is connected to the bus in order to output bit sequences as a function of a bus voltage, an interface circuit for controlling a sleep mode and a normal mode, a detector circuit for evaluating the bus voltage which is connected to the bus, a timer device that is connected to an output of the detector circuit and to the interface circuit. Whereby, the detector circuit, the timer device, and the interface circuit are designed to detect an exceedance of a time threshold by a waveform of the bus voltage of the bus, and to continue a sleep mode in the event of an exceedance, wherein the time threshold is greater than the duration of a wake-up command.

主权项

1. A method, comprising:
monitoring a bus voltage on a Local Interconnect Network (LIN) bus by a slave circuit; detecting by the slave circuit when the bus voltage falls below a first threshold value and a wake-up detection phase is thereby started; evaluating a time duration of a drop of the bus voltage falling below a second threshold value by the slave circuit in the wake-up detection phase; awakening the slave circuit from a sleep mode into a normal mode when the time duration of the drop below the second threshold during the wake-up detection phase is associated with a wake-up command; and continuing the sleep mode of the slave circuit if the time duration of the drop below the second threshold value during the wake-up detection phase is not associated with the wake-up command.