cube007
Full Member level 6
Hello,
For getting the best performance I would like to implement a SD card IP within an FPGA which communicates with a SD Card in SD bus mode. As far as I know the first steps are as follows:
1. Send command CMD55
2. Send command ACMD41 with OCR data
3. Wait for response to the ACMD41 command
After sending CMD55 and ACMD41 I get no response from the card. The card works fine in my PC so I think the protocol machine fails. Now I need a detailed description of the initialization process. It’s also possible that I’m calculating the CRC not correct. Dou you have some examples or deep information for me?
Bye,
cube007
For getting the best performance I would like to implement a SD card IP within an FPGA which communicates with a SD Card in SD bus mode. As far as I know the first steps are as follows:
1. Send command CMD55
2. Send command ACMD41 with OCR data
3. Wait for response to the ACMD41 command
After sending CMD55 and ACMD41 I get no response from the card. The card works fine in my PC so I think the protocol machine fails. Now I need a detailed description of the initialization process. It’s also possible that I’m calculating the CRC not correct. Dou you have some examples or deep information for me?
Bye,
cube007