FM3 : CY9BF117SPMC-GK7MJE1 : SD-card may not be read properly

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
MiNe_85951
Level 7
Level 7
Distributor - TED (Japan)
50 likes received 500 replies posted 50 solutions authored

Dear Sirs and Madams,

 

We have set CH1 of CSIO to SPI mode and used it for communication with the SD card.

However, in rare cases, the phenomenon that the data from the SD card cannot be read occurs.

 

We are using DMA to transfer data from CSIO to RAM.

When We investigated the problem behavior, We found that SS (Stop Status) was 0x02 in the DMACB register of DMAC.

In other words, We ware able to confirm that a transfer stop request was issued, but We have not been able to identify the cause.

 

What could be the cause of the issue of a transfer stop request?

Also, do you know how we can find out why a transfer stop request is issued?

 

Regards,

0 Likes
0 Replies