Lovelysunshiny Storage Board TF Trans-Flash Card Memory Shield Module SPI for Arduino Features:Support Micro memory card (high-speed card).The level conversion circuit board that can interface level is 5V or 3.3V.Communication interface is a standard SPI interface.Control Interface: A total of six pins (GND, VCC, MISO, MOSI, SCK, CS), GND to ground.VCC is the power supply, MISO, MOSI, SCK is the SPI bus, CS is the chip select signal pin.Descriptions: 3.3V regulator circuit: LDO regulator output 3.3V as level converter chip, Micro memory cardsupply;Level conversion circuit: Micro memory cardinto the direction of signals into 3.3V,Micro memory card toward the direction of the control interface MISO signal is also converted to 3.3V, general AVR microcontroller system can read the signal;Micro memory card connector: yes since the bomb deck for easy card insertion and removal.Positioning holes: 4 M2 screws positioning hole diameter of 2.2mm, easy to install positioning, to achieve inter-module combination;Specifications:Power supply:4.5V - 5.5V, 3.3V voltage regulator circuit boardPositioning holes: 4 M2 screws positioning hole diameter of 2.2mmControl Interface: GND, VCC, MISO, MOSI, SCK, CSSize:45 x 28mmShipping content:1x TF Card Shield Expansion Board