Specifications

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4.20.4. SD Operations
4.20.4.1. SD Initialize
It is required to initialize SD card state for SD operation. The state of SD is
roughly varied into Identification mode and Data transfer mode. It is absolutely
required to disconnect the power of SD card when the SD card has become
Inactive state.
Transfer of each state is as following figure. Data transfer of SD card starts from
“tran” state under Data transfer mode. For the definition of each SD command,
see SD Memory Card Specification.
Figure 4-49. SD Initialization Process