AnsweredAssumed Answered

[Continue]Can't into USB download mode in SD/MMC manufacture boot flow for i.MX6ULL

Question asked by ko-hey on Jun 4, 2018
Latest reply on Jun 13, 2018 by ko-hey

Hi all

 

My customer and I are testing SD/MMC manufacture boot flow and have a question about it for i.MX6ULL.

Their custom board has eMMC(uSDHC1) and SD card socket(uSDHC2).

They want to use SD/MMC manufacture boot on their custom board but it fail.

So they made same condition in MCIMX6ULL-EVK and tried it but they have not succeeded yet.

 

Could you tell me why it can't into a USB download mode ?

 

 

Here are our working condition.

 

CC: 700-29364 REV A, SCH-29364 REV A

BB: 700-28616 REV A, SCH-28616 REV C

 

Our test is as follows.

 

Test1.

---------------------------------------------

Condition:

SW602 to OFF, ON

SW601 to OFF, OFF, ON, OFF

no MicroSD card (uSDHC2) which has a socket on cpu board

no SD card (uSDHC1) which has a socket on base board

 

Result:

It can detect board by mfgtool.

---------------------------------------------

 

 

Test2.

---------------------------------------------

Condition:

SW602 to OFF, ON

SW601 to OFF, OFF, ON, OFF

no MicroSD card which has a socket on cpu board

SD card which has a socket on base board

 

*the SD card has no boot images.

 

Result:

It can't detect board by mfgtool.

---------------------------------------------

 

 

What makes that difference ?

 

 

Add info:

Yuri Muhin and Joan Xie helped me with the following thread.

https://community.nxp.com/thread/468643

https://community.nxp.com/thread/475216

 

 

Ko-hey

 

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