A microSD card reader and writer with included 3.3V regulator and level shifters making safe to interface with most 5V and 3.3V microcontrollers, including the Arduino Uno, Leonardo, Mega, Due, etc. The module uses an SPI interface for communication and is also compatible with the standard Arduino SD card library built into the Arduno IDE.
Features
Supports: Micro SD Card, Micro SDHC (high-speed card)Interface level: 5V or 3.3V
Power supply: 4.5V ~ 5.5V, 3.3V voltage regulator circuit board
Communication interface: Standard SPI
Control Interface: A total of six pins, GND, VCC, MISO, MOSI, SCK, CS
3.3V regulator circuit: LDO regulator output 3.3V
Level conversion circuit
Positioning holes: 4 x M2 screw holes for easy positioning. Hole diameter is 2.2mm
Pinout
1....CS (Chip Select)
2....SCK
3....MOSI
4....MISO
5....VCC
6....GND