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PSoC 5, 3 & 1 MCU

New Contributor II

I soldered wires directly to an SD card and connected as described in the emFile Code Example PDF. I am using an external supply for 3.3V. I am wondering if I need to pull the signal lines up through resistors to 3.3V. If so, what value of resistors are suitable.

Thanks,

Todd

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Contributor II

I am working on approximately the same thing.  Look for my next post , PSOC and SDCARD on the psoc 5 forum.

This link is interesting and may help:

GitHub - hackingchips/PSoC_FatFs: Port of ELM-CHAN FatFs library to Cypress PSoc microcontrollers.

This link is full of information about sd cards.

FatFs - Generic FAT Filesystem Module

According to that site, How to Use MMC/SDC , you need a pull up resistor on SD Card DO in order to reliably cause it to go into SPI mode.

happy reading.

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Contributor II

I am working on approximately the same thing.  Look for my next post , PSOC and SDCARD on the psoc 5 forum.

This link is interesting and may help:

GitHub - hackingchips/PSoC_FatFs: Port of ELM-CHAN FatFs library to Cypress PSoc microcontrollers.

This link is full of information about sd cards.

FatFs - Generic FAT Filesystem Module

According to that site, How to Use MMC/SDC , you need a pull up resistor on SD Card DO in order to reliably cause it to go into SPI mode.

happy reading.

View solution in original post

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