hitoshi ogasawara

i.MX25 Boot:Mysterious phenomenon

Discussion created by hitoshi ogasawara on Feb 25, 2014
Latest reply on Feb 27, 2014 by hitoshi ogasawara

Dear Sir,

 

Our customers will have to question the behavior of the Boot "i.MX25".

Someone, the information!

 

 

I use DDR2.

Writing a 0xFFFF_FFFF to this 0x8000_0080 of DDR2, and asserted 'L' the POR_B.

Then, negates the 'H' in the POR_B within 1sec, I hope BOOT BOOT start but does not start.

The similar phenomenon Writing 0x0000_0000 the write value.

However, to start the BOOT is selected by writing "value 0xFFFF_FFFF, of 0x0000_0000 other than".

So I have a question.

Q1.

By writing the 0x0000_0000 or 0xFFFF_FFFF to 0x8000_0080 address is protected?

Q2.

When the Boot, Is there a 0x8000_0080 address that will affect?

 

Best Regards,

Jin.

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