This module (MicroSD Card Adapter) is a Micro SD card reading and writing
module. Through the file system and SPI interface driver, the
microcontroller system can read and write files in the MicroSD card.
Arduino users can directly use the SD card library that comes with the
Arduino IDE to complete the initialization, reading and writing of the cardThe module features are as follows:
1. Support Micro SD card, Micro SDHC card (high speed card)
2. Onboard level conversion circuit, that is, the interface level can be 5V or 3.3V
3. The power supply is 4.5V~5.5V, and the onboard 3.3V voltage regulator circuit
4. The communication interface is a standard SPI interface
5.4 M2 screw positioning holes for easy installation
System interface: a total of 6 pins (GND, VCC, MISO, MOSI, SCK, CS), GND is the ground, VCC is the power supply, MISO, MOSI, SCK are the SPI bus, and CS is the chip selection signal pin,
3.3V voltage stabilizing circuit: The 3.3V output of LDO voltage stabilization is the power supply of level conversion chip and Micro SD card,
Level conversion circuit: The signal towards the Micro SD card is converted to 3.3V, and the MISO signal from the MicroSD card towards the control interface is also converted to 3.3V, which can be read by the general AVR microcontroller system,
Micro SD card holder: It is a self-elastic card holder, which is convenient for inserting and removing the card.
Positioning holes: 4 M2 screw positioning holes with a diameter of 2.2mm, which makes the module easy to install and position and realize the combination between modules