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About the value of MPZQSWCTRL [ZQ_CMP_OUT_SMP] of i.MX6Solo

Question asked by yuuki on Jun 12, 2014
Latest reply on Jun 19, 2014 by Yuri Muhin

Dear all,

 

I am referring to the following part.

IMX6SDLRM.pdf (Rev1):

- 45.11.2.1.1 ZQ automatic Pull-up calibration
- 45.11.2.1.2 ZQ automatic Pull-down calibration

 

The following contents are explained to these sequences.
"MMDC waits few cycles according to MPZQSWCTRL[ZQ_CMP_OUT_SMP] before sampling the comparator output (i.e zq_comp_out)."

 

We do not understand the value which should be set as ZQ_CMP_OUT_SMP field.

 

What becomes a standard in order to choose this value?
When this value is too small, what kind of problem occurs?

 

May I have advice?

 

Best Regards,

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