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.