Pin configuration: IO13, IO14, IO15, IO2, IO4, IO12 are pulled up using 10K ohm resistors. One end of the resistors is connected to 3V3, and the other end is connected to the respective pins. SDIO master-slave firmware should be programmed accordingly.
The module indicates the connection and disconnection states through the CONN_IND pin. A high voltage level represents a connected state, while a low voltage level represents a disconnected state.
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