2 shots
The module (Microsd card adapter) Micro sd, through file system and spi interface driver, microcomputer system can complete microsd card file read and write. Users can use de-own sd card library to complete the initialization and read-writing module features as follows::
- support to micro sd cards、 micro sdhc card (High-speed cards)
- plate-load level conversion circuits, interface level can be 5 v or 3.3v
- power supply 4.5v~5.5v, 3.3v
- communication interface as standard spi interface
5.4 m2, easy to install
Projects
Minimum
Typical values
Maximum value
Unit
Power voltage vcc
4.5
5
5.5
V
Current
0.2
80
200
Ma
Interface level
3.3 or 5
V
Type of support card
Micro sd card (2g), mirco sdhc card (32g)
—
Size
42x24 x 12
Mm
Weight
5
G
The interface of the mirco sd card module is shown below:
Control interface: Total 6 pins (Gnd、 vcc、 miso、 mosi、 sck、 cs), gnd land, vcc for power supply, miso、 mosi、 sck spi bus, cs
3.3v: Ldo 3.3v、 micro sd
Level conversion circuit: Conversion of signals to micro sd cards to 3.3v, microsd card miso signal to control interface direction is also converted to 3.3v, general avr single chip computer system can read the signal
Micro sd: It 's a self-bounce-type card, convenient card insertion.
Positioning holes: 4 m2, aperture is 2.2mm, make the module easy to install and position, implementation of inter-module combination