| 摘要 |
<p>A method of communication comprising sending communication signals switched between dominant and recessive values at clock intervals in frames over a serial data bus (15 - 17) from at least one of a plurality of sending nodes (1 - 5, 8, 9, 12, 13) to a plurality of receiving nodes (1, 2, 4, 7 - 13). The receiving nodes have an operational state and a standby state in which the current consumption of the node is reduced compared to the operational state. The receiving nodes include wake-up trigger means (19) for triggering transition from the standby state to the operational state in response to the communication signals. The frames of the transmitted signals include an identifier field (ID St, ID Ex) during which the communication signal alternates between the dominant and recessive values in successive clock intervals with at least one significant occurrence during which the communication signal remains at one of the dominant and recessive values during at least two successive clock intervals, and the trigger means (19) is selectively responsive to the position of the occurrence within the identifier field for triggering the transition from the standby state to the operational state.</p> |
