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SDHC layout recommendations

Question asked by Fernando Alcaide on Jun 6, 2016
Latest reply on Jun 9, 2016 by Fernando Alcaide

Dear,

 

I am designing  Board  with Vybrid VF6 and I have doubt about SDHC layout recommentaions appears in paragraph 3.3.2.3 SD Card interface requirements of ref. doc. VYBRIDHDUG_HW_UserGuide.

 

In this paragrap appears:

1. The clock trace should be longer than the longest trace in the Data /Command group (+5mils).

Is 5mils minimun distance or  maximum  ?

 

2. SD card interface layout requirements are very similar to those for the DDR one (see Section 3.5,

“DDR routing rules”).

But in this section appears DDR3 recommnedations?

 

I need to kown routing recomentadion to SDHC.

 

Can somebody help me?

 

Thank you in advance.

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