SD_WP and SD_CD IOMUX Setting

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SD_WP and SD_CD IOMUX Setting

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pfsang
Contributor IV

hi, all

         when i read the SarbreAI souce about SD card, i have a question for iomux setting of USDHC.

         for example, the SD_CD pin connects with GPIO_1 pad in SabreAI.

          According to chip manual , the pad should be set to ALT6

         12219_12219.jpgsd_cd.JPG.jpg

           but in source, it set the GPIO_1 pad to ALT5

           like this:

               //SD1_CD

              MX6Q_PAD_GPIO_1__GPIO_1_1,

         i don't know what the difference between them is.

B&R

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igorpadykov
NXP Employee
NXP Employee

Hi fang

for CD,WP one can use these dedicated pins and

any GPIOs. Idea is well described in

Chapter 15 Adding Support for the i.MX53 eSDHC

MX53UG MX53SUG.book

Best regards

chip

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