Difference between cold and warm reset

[ko-hey]

Hi all I can't understand between cold and warm reset. In reference manual P5062, there is a table that is shown SRC reset functionality. However, there are no difference between cold and warm reset. http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6DQRM.pdf What is the difference between cold and warm reset? Best Regards,

[igorpadykov]

Hi ko-hey

difference is dscribed in sect.60.6.1.2.4 COLD RESET

60.6.1.2.5 WARM RESET IMX6DQRM

Probably main difference is that during warm reset MMDC

can put DDR in self refresh.

Best regards

igor

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[ko-hey]

Hi Igor

Thank you for your replay.

However, it's not about sequence. I want to know about functionally difference.

Here is my understandings. Are these correct?

• POR will erase all data including each register value
• COLD reset will erase all data except each register value
• WARM reset will do self-refresh to DDR

Best Regards,

[igorpadykov]

Hi ko-hey

I am not sure that such complex subject may be explained

in such simple manner. Please look carefully documentation

in particular Table 60-4. SRC reset functionality IMX6DQRM

~igor

[ko-hey]

Hi Igor

I apologized it. I think it is just as you say.

So let me talk about Table 60-4.

In Table 60-4, it looks no functionally difference between COLD and WARM reset.

What's the difference between COLD and WARM reset?

Is the main difference only self refresh?

Best Regards,

ko-hey

[igorpadykov · Accepted solution]

Actually there is always alternative: provide short and not

accurate answer and provide long and accurate. I would choose last. :smileyhappy:

[ko-hey]

Igor

I understood that WARM reset is similar to CLOD reset except to MMDC.

Thanks

ko-hey