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Question, i.MX28 recovery mode

Question asked by AVNET JAPAN FAE (team share account) on Nov 24, 2014
Latest reply on Dec 1, 2014 by Artur Petukhov

Dear team,


I would like to ask about i.MX28 recovery mode.

My customer is testing if i.MX28 enters into recovery mode on their own board.

On their board, i.MX28 seems not to enter the recovery mode even when PSWITCH pin is connected to its high level.

When the PSWITCH pin is tied to high, i.MX28 seems not to work during 5 seconds after power on. Then i.MX28 starts boot from its original boot source(SPI Flash).

It seems to be reasonable for i.MX28 not to work during 5 seconds according to the description in reference manual. But after the 5 seconds, i.MX28 does not enter the Recovery mode.

Could you give your advice to make i.MX28 enter recovery mode?

The customer measured the voltage of PSWITH pin, and it was 2.1V at that time.