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i.MX53 SD card I/F usage

Question asked by ko-hey on Sep 2, 2015
Latest reply on Sep 2, 2015 by ko-hey

Hi all

 

 

I want to confirm about the meaning of the word "Pull up" in Table 30-1 at following document.

http://cache.freescale.com/files/32bit/doc/ref_manual/iMX53RM.pdf?

 

 

In the Table 30-1, there is a column that named "Pull up".

What is this mean ?

Does the user should be pull up for each signals ?

 

 

However, in the schematics of SABRE Platform for Tablets Reference Design based on i.MX53, the SD1_DATA0, SD1_DATA1 and SD1_DATA2 signals are not pull-uped.

Because of those difference, I'm confusing.

So please let me know the meaning of the column.

 

 

 

 

 

Ko-hey

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