Patent ID: 11868293
Assignee: ROBERT BOSCH GMBH
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 1:
2. A device of a user station, which is one of a plurality of user stations of a serial bus system, the device comprising:
circuitry coupled to lines of a bus of the bus system, by which a signal is receivable from the bus of the bus system, the signal being based on a transmission signal via which a message is exchanged between the user stations of the bus system; and
a processor, wherein:
the processor is configured to:
in a first communication phase in which, in the signal, a recessive bus state is overwritable by a dominant bus state, interpret the received signal using a first reception threshold;
in a second communication phase in which bus states other than the recessive and the dominant bus states are present in the signal, interpret the receives signal using a second reception threshold;
evaluate the signal from the bus of the bus system using a switchover reception threshold that differs from the first reception threshold and the second reception threshold; and
perform a time-limited switchover of the user station from a mode in which the first reception threshold is used to a mode in which the second reception threshold is used in response to detection of presence of a predefined bus level of the transmission signal using the switchover reception threshold; and

for the time-limited switchover of the reception threshold from the first reception threshold to the second reception threshold, switch the user station into an operating mode that differs from three other operating modes of the device, and wherein the three other operating modes of the device include:
a first operating mode for transmitting and/or receiving the signal in the first communication phase,
a second operating mode only for receiving the signal in the second communication phase, and
a third operating mode for transmitting and receiving the signal in the second communication phase.