User manual

22.8.2018 Pmod MicroSD Reference Manual [Reference.Digilentinc]
https://reference.digilentinc.com/reference/pmod/pmodmicrosd/reference-manual 5/7
MicroSD card slot
Store and access large amounts of data from your system board
No limitation on file system or memory size of microSD card used
1-bit and 4-bit communication
12-pin Pmod port with SPI interface
The Pmod MicroSD is a great way to store and access information on a device that can then be accessed by outside devices such as a
phone or computer.
The Pmod MicroSD is designed to communicate with the host board primarily through the SPI protocol
(https://reference.digilentinc.com/pmod/communication_protocols/spi). By default, the microSD card itself is defined to boot up in SD mode,
but will enter into SPI mode when the Chip Select line is pulled low. The actual technique of writing to and reading from specific
locations on an microSD goes beyond the scope of this document, but the complexity of the process is nicely abstracted away within the
chipKIT SD library and Digilent PmodSD () IP Core.
A pinout description table for the 2×6 pin header on the Pmod MicroSD can be found below:
Connector J1- Pin Descriptions
Pin Signal Description Pin Signal Description
1 ~CS () Chip Select / Data3 7 DAT1 Data 1
Features
Functional Description
Interfacing with the Pmod