iMX7Solo USB serial downloader not recognized

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iMX7Solo USB serial downloader not recognized

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igal_kagan
Contributor I

Hello.

I'm using iMX7Solo device in my board. I'm trying to connect to the device by USB serial downloader, but PC not recognize any USB device. 

Note: I set BOOT_MODE to "01" and all the voltages are OK, RESET de-asserted. 

Screenshot 2021-01-14 193737.png

When I'm connecting with JTAG, it recognizes the Cortex A, and Cortex M cores without any problem. But no USB activity at all.

Please, help me to solve this issue.

Thanks.

Best regards,

Igor.

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AldoG
NXP TechSupport
NXP TechSupport

Hello,

My first suggestion would be to check that the VBUS supply on the OTG connector is default as off when the boards power up, and should be the processor which turn it on as specified n the Hardware design guide.

Does one of the snapshots correspond to this?

Best regards,
Aldo.

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igal_kagan
Contributor I

Additionals:

Power rails snapshot OK:

reset1.jpg

BOOT_MODE[1:0] pins are settled before RST de-asserted:

usb.jpg

eFuse Manufacturing mode is 1: 0x30350490=0x00800000

But, still there no USB detection on the PC...

Please, help me solve this issue.

 

Thanks.

Best regards,

Igor.

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1,139 Views
AldoG
NXP TechSupport
NXP TechSupport

Hello,

My first suggestion would be to check that the VBUS supply on the OTG connector is default as off when the boards power up, and should be the processor which turn it on as specified n the Hardware design guide.

Does one of the snapshots correspond to this?

Best regards,
Aldo.

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igal_kagan
Contributor I

The problem was Vbus voltage.

Thanks a lot!

 

Igor.

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