EXIT from DDR self refresh mode in i.MX6D

[ko-hey]

Hi all,

According to the section 44.4.6.2 Self refresh and Frequency change entry/exit of reference manual, it shows the flow of entry and exit self-refresh mode.

However, the description doesn't say about SRX (Self Refresh Exit) command.

1. Does i.MX issue the SRX command by themself ?

2. If 1 is yes, when will it issue the command ?

  Could you specify the timing in the flow of section 44.4.6.2 ?

Ko-hey

[art]

Q. Does i.MX issue the SRX command by themself ?

A. Yes.

Q. If 1 is yes, when will it issue the command ?

A. According to the DDR3 JEDEC standard, the issue of the SRX command consists of transitioning the CKE signal from Low to High with the CS# signal staying High. So, the moment of the CKE signal assertion is the moment of issuing the SRX command.

Have a great day,
Artur

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[ko-hey]

Could someone follow and answer this question ?

Ko-hey