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Questions about eLCDIF register of i.MX7D

Question asked by ko-hey on Feb 2, 2017
Latest reply on Feb 5, 2017 by igorpadykov

Hi all

 

I have several questions about eLCDIF register of i.MX7D.

 

Q1. Question about DATA_SELECT field of eLCDIF General Control Register in P3657.

 

1-1

I read section 13.2 but can't understand a difference of "Command mode" and "Data mode".
Is there any description for it ?
Could you explain the "Command mode" and "Data mode" ?

 

1-2

There are following description.

""Command Mode. DCn signal is Low""

 

However, there are no description about "DCn".
What is DCn signal ?

 

 

Q2. Question about MASTER field of eLCDIF General Control Register in P3658.

 

2-1

My understanding is as below. Am I correct ?

In MPU i8080 mode, user set MASTER field to "1" when Write.
In MPU i8080 mode, user set MASTER field to "0" when Read.


2-2

Does the "PIO mode" mean "program I/O mode" ?

If above understanding is uncorrect, please explain the meaning and function.

 

 

Q3. Question about OUTSTANDING_REQS field of eLCDIF General Control2 Register in P3662.

 

1

Let me confirm the meaning of "Number of outstanding transaction".

The meaning of "Number of outstanding transaction" is that how many untransmitted data can be held of the transmission data in Master mode (default is 2 data) ?
Is it like an internal buffer?

 

 

Ko-hey

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