Features The module MicroSD Card Adapter is a Micro SD card reader module and the SPI interface via the file system driver microcontroller system to complete the MicroSD card read and write files users can directly use theIDE comes with an SD card to complete the library card initialization and read writeModule features are as follows Support Micro SD Card 2G Micro SDHC card 32G high speed card The level conversion circuit board that can interface level is 5V or 3 3VPower supply is 4 5V 5 5V 3 3V voltage regulator circuit boardCommunication interface is a standard SPI interface4 M2 screw positioning holes for easy installationSize 4 1 x 2 4cmControl Interface A total of six pins GND VCC MISO MOS1 SCK CS GND to ground VCC is the power supply MISO MOS1 SCK is the SPI bus CS is the chip select signal pin3 3V regulator circuit LDO regulator output 3 3V as level converter chip Micro SD card supplyLevel conversion circuit Micro SD card into the direction of signals into 3 3V MicroSD card toward the direction of the control interface MISO signal is also converted to 3 3V general AVR microcontroller system can read the signalMicro SD card connector It is a self drilling card holder for easy insertion and removal of the card Positioning holes 4 M2 screws positioning hole diameter of 2 2mm the module is easy to install positioning to achieve inter module combinationPackage included 3 x Micro SD TF card module