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本帖最后由 超級狗 于 2016-12-13 09:09 编辑 $ o1 o& U; W3 ?0 J4 Y! {; m" M9 y
' M1 |* M, Q: b# DMicroChip Design Guidelines for USB225x/USB224x/USB264x/USB266X High-Speed SD
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7 n6 ^, Z' G @& x% sAmong SD_DAT[0:3] +/-750 mil Maximum
( L* E1 d+ K& v3 MSD_DAT[0:3] to SD_CLK -250 mil to +1500 mil' l! H: f. G% ~1 I& O
SD_CMD to SD_CLK -250 mil to +1500 mil
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. V2 C! @6 R, e: e- m 這是 MicroChip SD 2.0 / MMC 4.2 USB 讀卡機芯片的建議!3 G P5 n% z8 x' M
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