Can SD card be hot plugged into it's slot?
Yes, it can be hot plugged. When we say hot plugged, it meant inserting or removing the SD card when the device is powered ON. This all depends on two scenario,
- When a SD card is hot plugged, the device for example Mobile phone any embedded board must be able to detect it's presence using the CARD DETECT pin. The simplest mechanism shall be use a external pull-up on the CARD DETECT pin connected to processor/microcontroller and once the card is inserted, the CARD DETECT pin shall be connected to COMMON terminal there by changing state of the input to processor or controller.
- Once the card is detected, the power shall be enabled to the card. A switching mechanism for ENABLE must be implemented in the Hardware circuit.
- The drivers for SD CARD must support all this functionality
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