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MSP430FR5994: SDCARD access

Part Number: MSP430FR5994

Thank you for your help
from Japan. It was
English is not my native language, so I will post it with Google Translate.
We are currently developing software with MSPEXP-430FR5994.
I have a question about the access of the SD card in it.

I am currently writing a program to store binaries in an SD card.
The initialization command returns ACK.
Also, ACK is returned for both the write command (CMD24) and the read command (CMD51). But then the data token (0XFE)
There is no response.

It's a preliminary survey, but I've been worried about a month.
Would you please support me?

Thank you.

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