Is tying low the CD_B and WP necessary for eMMC?

cancel
Showing results for 
Search instead for 
Did you mean: 

Is tying low the CD_B and WP necessary for eMMC?

264 Views
sumant_s_khalat
Contributor II

Hi,

I'm interfacing an eMMC chip to the i.MXRT1062 controller using USDHC2 peripheral. While I was going through the reference manual(IMXRT1060RM) I came across the below table, which suggests tying low the CD_B and WP pins in case of embedded memory.

My question is can we not assign any pins to these signals(as we have exhausted the pins on the controller) and still move ahead with it and use the eMMC chip.

Are there any config registers that we can use to override these signals?

pastedImage_2.png

Regards,

Sumant

Labels (1)
0 Kudos
1 Reply

190 Views
kerryzhou
NXP TechSupport
NXP TechSupport

Hi Sumant Khalate 

    Please follow the reference manual recommended operation, if you don't want to use it, tie the pin low, CD_B pin low status is used to indicate a card attached.

Wish it helps you!
Have a great day,
Kerry

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
-------------------------------------------------------------------------------

0 Kudos