FSSD07 : connecting with SD card and host( STM32) with FSSD07, Cann't work

1.when connecting SD card and STM32 with FSSD07, STM32 can detect the card, but cannot read data;
2.if remove FSSD07, connect SD and STM32 directly, the system works well. (same PCB);
Is there any important points when using FSSD07 ?


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