MSP430F5519: Micro SD Card Connection - DM3D-SF

Nurdan Mert

Part Number: MSP430F5519

Hello,
I want to store data with micro sd card in my circuit, but I couldn't find a specific sd card connection image for MSP430. I adapted my own micro sd card according to the only image I could find. Can it work smoothly as a result of the connection I made?

Here is my SD card connection:
CLK -> SCLK
DAT0 -> MISO + 50K TO 3V3
DAT1 -> 50K TO 3V3
DAT2 -> 50K TO 3V3
CD/DAT3 -> CS + 50K TO 3V3
CMD -> MOSI + 50K TO 3V3
VDD -> 3V3
SWA AND SWB -> NULL
SHIELD -> NULL
VSS ->GND

I would be very grateful for your answers, thank you.

over 4 years ago

0 David Schultz over 4 years ago

Guru 26175 points

That should work. But you don't need all of those resistors. The signals driven by the MSP430 (SS, MOSI, SCK) certainly do not need them as they will be driven high or low. The unused DAT pads don't need them either. Just MISO - DAT0. Maybe.

The resistor is a holdover from the MMC card era when it was expected that more than one card would be on the bus.

0 Nurdan Mert over 4 years ago in reply to David Schultz

Prodigy 80 points

CLK -> SCLK
DAT0 -> MISO + 50K TO 3V3
DAT1 -> 3V3
DAT2 -> 3V3
CD/DAT3 -> CS + 50K TO 3V3
CMD -> MOSI + 50K TO 3V3
VDD -> 3V3
SWA AND SWB -> NULL
SHIELD -> NULL
VSS ->GND

Is this okay or not?

0 Xiaodong LI over 4 years ago

TI__Mastermind 25285 points

at the same time, please format the SD card on the FAT16 or FAT32 file format. Thanks!

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MSP430F5519: Micro SD Card Connection - DM3D-SF