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Which power state does a module enter between wake and sleep?

  • A.A standby condition in which the processor is halted but the transceiver continues to monitor the bus for activity
  • B.A low current standby state retaining memory
  • C.A fully powered state, which is maintained until the ignition is switched off and the module is disconnected
  • D.No state

Answer: B

The transceiver stays alert on microamps while the processor sleeps. The last option describes exactly that arrangement, which makes it a correct and more detailed version of the same answer. Checking which component actually carries the load settles most questions of this kind at once. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. A symptom that appears under one condition and not another is what narrows the diagnosis quickly.

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