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![]() Then I increase SPI clock frequency to 6MHz. Then I read CSD register with CMD9 in order to get the READ_BLOCK_LENGTH which is already set to 512 bytes. I'm able to initialize the SD card in SPI mode, by sending 80 clocks 375kHz, the CMD1 is accepted and SD go out of its idle state. I choose a 18LF2520 in order to power my dev card with 3.3V. I'm working on a SD card project in SPI mode. ![]() SD card always in idle state after CMD1 accepted
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June 2023
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