BMW G12 2015 Technical Training Manual page 77

G12￿Voltage￿Supply￿and￿Bus￿Systems
4.￿Terminal￿Control
4.3.2.￿Prerequisites￿of￿control￿units￿for￿partial￿network￿operation
Different￿transceivers￿are￿used￿in￿order￿to￿determine￿partial￿network￿operation￿in￿control￿units.￿These
transceivers￿are￿able￿to￿evaluate￿and￿interpret￿messages.￿A￿control￿unit￿remains￿switched￿off￿as￿long
as￿bus￿communication￿takes￿place￿without￿a￿valid￿wake-up￿event￿for￿the￿corresponding￿control￿unit.￿If
a￿valid￿wake-up￿event￿for￿the￿corresponding￿control￿unit￿is￿sent￿on￿the￿bus,￿the￿transceiver￿can￿activate
the￿voltage￿regulator￿of￿the￿microcontroller￿and￿the￿control￿unit￿starts￿up.￿The￿control￿unit￿is￿switched
off￿by￿deactivation￿of￿the￿voltage￿regulator.
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