About SD Card Power Down

cancel
Showing results for 
Search instead for 
Did you mean: 

About SD Card Power Down

Jump to solution
56 Views
Contributor III

Hello,Community

As shown below, at power down, CLK, CMD and DATA must be logic 0.

For example, if you use SW_MUX_CTL_Register(IOMUXC_SW_MUX_CTL_PAD_SD1_CLK) for ALT0_SD1_CLK and use it as a clock, do you have to perform the following processing at power down?

Or can the program force a logical 0 to be output?

1.Change the allocation to 100kPD(IOMUXC_SW_PAD_CTL_PAD_SD1_CLK).
2. Change the allocation to ALT5_GPIO5_IO3(IOMUXC_SW_MUX_CTL_PAD_SD1_CLK).
3. Assign to input with GPIOx_GDIR.

pastedImage_1.png

best regards

Goto

Labels (1)
0 Kudos
1 Solution
10 Views
NXP TechSupport
NXP TechSupport

Hi GoTo

you are right, one can force signals to logical 0 in software

using your sequence.


Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

View solution in original post

0 Kudos
1 Reply
11 Views
NXP TechSupport
NXP TechSupport

Hi GoTo

you are right, one can force signals to logical 0 in software

using your sequence.


Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

View solution in original post

0 Kudos