Thomas TRUILHE

I have few more question please. It is written in the Reference Manual that the communication can be over 1 bit or 4 bits ? Could you explain me what does this significates ? Is it related to SPI or SD Mode or something like that ? Or can we use Quad Spi ? Last question, is it mandatory to use the chipKIT SD Library to use the module. I would like to implement a filesystem on the sd card and I can see that there are a lot of examples provided with my microcontroller (Espressif). These examples explain how to communicate with a sd card using SPI and how to mount a filesystem on it but how can be sure that it can work with the Psmod Module ? Is the way of reading or writting on a SD Card normalized between all the manufacturers ? This question because I can see on the reference manual that everything that I linked to reading/writting to PsMod SD Card is abstracted in your chipKit. Is it possible that it is the same process in Espressif examples ? Thank you for all your help. I would like to understand how to use your device before doing something. Best regards, Thomas TRUILHE

Good afternoon, my company recently bought a Pmod Micro SD card that I have to interface with a microcontroller. Looking at the Reference Manual, it seems that it is possible to communicate with the SD Card using the SPI Protocol. As I remember, the SPI protocol uses 4 pins (CS, MOSI, MISO and CLK), however on the input connected I can also found DAT1 and DAT2 signals. Could you please explain me what are these signals exactly ? Moreover, it is written in the document that the PMod Micro SD card boots up in SD Mode. I would like to know what it means. Is it another way to communicate with the SD card ? Is it another protocol ? Maybe using the DAT1 and DAT2 and maybe DAT 3 ??? Could you please explain me how the PMod Micro SD works ? Moreover, I can see in the reference manual that the process is abstracted away within the chipKIT SD Library and Digilent Pmod SD IP Core. What are these things exactly ? Do I have to use one of them in my firmware development ? Maybe the two ?? Could you please give me as much details as possible ? Best regards, Thomas TRUILHE