在通过SPI配置LMK04821时,发现SDIO的管脚不能正常的拉高或者拉低,导致MCU与LMK04821通信失败,SDIO的幅值一直在1.5V左右。请教一下如何处理。SDIO管脚外部上拉4.7K
地址1f1f 数据ff
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