SNIP_CLASSIC_CANTRCV_SECTION_7_10_Transceivers_with_selective_wakeup_functionality

7.10 Transceivers with selective wakeup functionality This section describes requirements for CAN transceivers with selective wakeup functionality. Partial Networking is a state in a CAN system where some nodes are in low power mode while other nodes are communicating. This reduces the power consumption by the entire network. Nodes in the low-power modes are woken up by pre-defined wakeup frames. Transceivers which support selective wakeup can be woken up by Wake Up Frame/ Frames (WUF), in addition to the wakeup by Wake Up Pattern (WUP) offered by normal transceivers. [SWS_CanTrcv_00174] ⌈If selective wakeup is supported by the transceiver hardware, it shall be indicated with the configuration parameter CanTrcvHwPnSupport.⌋ [SWS_CanTrcv_00175] ⌈The configuration container for selective wakeup functionality (CanTrcvPartialNetwork) and for the following APIs: • CanTrcv_GetTrcvSystemData, • CanTrcv_ClearTrcvWufFlag, • CanTrcv_ReadTrcvTimeoutFlag, • CanTrcv_ClearTrcvTimeoutFlag and • CanTrcv_ReadTrcvSilenceFlag shall exist only if CanTrcvHwPnSupport = TRUE.⌋ [SWS_CanTrcv_00177] ⌈If selective wakeup is supported, CAN transceivers shall be configured to wake up on a particular CAN frame or a group of CAN frames using the parameters CanTrcvPnFrameCanId, CanTrcvPnFrameCanIdMask and CanTrcvPnFrameDataMask.⌋ [SWS_CanTrcv_00178] ⌈If the transceiver has the ability to identify bus failures (and distinguish between bus failures and other hardware failures), it shall be indicated using the configuration parameter CanTrcvBusErrFlag for bus diagnostic purposes.⌋ Note: For CAN transceivers supporting selective wakeup functionality, detection of wakeup frames is possible during Normal mode (CANTRCV_TRCVMODE_NORMAL). Detected wakeup frames are signaled by the transceiver WUF flag. This ensures that no wakeup frame is lost during a transition to Standby mode (CANTRCV_TRCVMODE_STANDBY).