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Modify SDHC power management states to optimize power management. SD card power management states
StateDescription
Runtime suspend or resume
  • The SD card enters the runtime suspend state after 50 ms of inactivity.
  • Resume occurs with the next SD card operation. This state is enabled by default and is not configurable.
  • The eMMC transitions to the runtime suspend state after 50 milliseconds of inactivity. It resumes with the next I/O operation. This feature is always enabled and cannot be configured.
System suspend or resume
  • The SD card enters system suspend state with the suspend event.
  • SD card system resume state occurs with the system resume event.
  • This state is enabled by default and is not configurable.
  • The eMMC enters system suspend mode upon receiving a suspend event and resumes operation with a system resume event. This functionality is always enabled and cannot be configured.