AnsweredAssumed Answered

i.MX6 uSDHC Delay-line

Question asked by Zongbiao Liao on Oct 31, 2016
Latest reply on Aug 21, 2018 by Yuri Muhin

Hello Community


About i.MX6 uSDHC DLL, I have some questions.


In uSDHCx_DLL_STATUS register, there are two concepts:Reference Delay-line and Slave Delay-line.


What are Reference Delay-line and Slave Delay-line?



What is the relationship between Reference Delay-line and Slave Delay-line?



I dumped the registers related to uSDHC4 on i.MX6SabreSd board.And I found that uSDHC4_DLL_CTRL is 0x00000000, which means that DLL is disabled.

But uSDHC4_DLL_STATUS is 0x00000200, which means that Reference delay line select taps is 2.

So why is Reference DLL  2 when DLL is disabled.


Thank you!