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#2137809
I could sure use some help with the SDHC response to CMD8. Almost like I have hit a brick wall. I am using an 8051 and usual connection via 74HCT circuit. My software is all in AL so not of much value to anyone else. My problem: It all works fine with some SDHC cards and fails with others. examples: K <<<<<< 8GB Kingston SDHC FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 40 00 00 00 00 95 FF 01 48 00 00 01 AA 87 FF 05 FF FF FF FF << 0x05 reply says error with something K <<<<<< 32GB Sandisk FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 40 00 00 00 00 95 FF 01 48 00 00 01 AA 87 FF C1 7F FF FF FF <<< 0xC1 ??? whats up? K <<< 4GB Sandisk SDHC FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 40 00 00 00 00 95 FF 01 48 00 00 01 AA 87 FF C1 7F FF FF FF <<< also 0xC1 ??? K <<<<< PNY 8GB SDHC FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 40 00 00 00 00 95 FF 01 48 00 00 01 AA 87 FF 01 00 00 01 AA <<< !!!! perfect Any suggestions would sure be appreciated. If there is anything I could share I'd be happy to. Roger