SENSORS GLOBAL BUS

摘要

Systems, methods and apparatus are described that offer improved performance of a sensor bus. A first command is transmitted to devices coupled to a serial bus operated in a first mode in accordance with a first protocol to cause the serial bus to be operated in a second mode. After communicating in accordance with a second protocol while the serial bus is operated in the second mode, a second command is transmitted to the plurality of devices in accordance with the first protocol to terminate the second mode. In the second mode, extra symbols inserted into a sequence of symbols transmitted on the serial bus prevent the occurrence of an unintended signaling state on the serial bus. Pulses transmitted on a wire of the serial bus in the second mode may have their duration limited such that a filter of a second device suppresses the limited-duration pulses.

主权项

1. A method performed in a data communication interface, comprising:
transmitting a first command to a plurality of devices coupled to a serial bus while the serial bus is operated in a first mode of operation, wherein the first command is transmitted in accordance with a first protocol to cause the serial bus to be operated in a second mode of operation; communicating with a first device of the plurality of devices in accordance with a second protocol while the serial bus is operated in the second mode of operation; and transmitting a second command to the plurality of devices in accordance with the first protocol to terminate the second mode of operation, wherein communicating with the first device includes:
encoding data in a sequence of symbols where clock information is encoded in transitions between consecutive pairs of symbols in the sequence of symbols;inserting an extra symbol between two symbols in the sequence of symbols when transmission of the two symbols without the extra symbol would cause an undesired signaling condition on the serial bus, and transmission of the two symbols with the extra symbol would prevent the undesired signaling condition on the serial bus; andtransmitting the sequence of symbols on the serial bus.