Hi,
I checked the i.MX6DQ datasheet but I couldn't understand the note#4 which attached to the uSDHC bus timing table.
I think hold time is specified and clear as tIH>1.5ns.
Why note#4 added?
note#4: "To satisfy hold timing, the delay difference between clock input and cmd/data input must not exceed 2 ns."
It seems redundant spec for the uSDHC IP or something or obsolete.
Futhermore clock is obviously not input but output always.
I compared to the LS1020A datasheet. There is no such notes.
Can anyone explain me?
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References:
https://www.nxp.com/docs/en/data-sheet/IMX6DQCEC.pdf
https://www.nxp.com/docs/en/data-sheet/IMX6SDLCEC.pdf
https://www.nxp.com/docs/en/data-sheet/IMXRT1050IEC.pdf
https://www.nxp.com/docs/en/data-sheet/MPC8306EC.pdf
...
https://www.nxp.com/webapp/Download?colCode=LS1020A
Solved! Go to Solution.
Hi torus1000
>It seems redundant spec for the uSDHC IP or something or obsolete.
you are right, seems this is misprint left from older i.MX documentation.
Best regards
igor
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Hi torus1000
>It seems redundant spec for the uSDHC IP or something or obsolete.
you are right, seems this is misprint left from older i.MX documentation.
Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
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