Micro SD SIP/SDIO interface – Micro SD card module TF card read and write CARDS, mini TF card read/write module The SPI way — — — — — – four wire system SDIO way — — — — — 6 wire system The power LED lights 4 fixed location hole 3.3 V or 5 V Read more about Micro SD Card Reader SIP/SDIO interface – Micro SD card module TF card read and write CARDS, mini TF card read/write module[…]