Type: 2pcs Micro SD TF Card Shield Expansion Board, Support Micro SD Card, Micro SDHC card (high-speed card).; 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.;
SPI Interface: A total of 6pins (GND, VCC, MISO, MOSI, SCK, CS), GND toground, VCC is the power supply, MISO, MOSI, SCK is the SPI bus, CS is the chip select signal pin.; On-board level conversion circuit, that means the interface level is 5V or 3.3V.; Power supply is 4.5V - 5.5V, Onboard 3.3V voltage stabilizing circuit.