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Title: USB has no power
Post by: Noone on May 11, 2020, 10:06:38 AM

I've got 4pcs A64-OLinuXino-1G boards (rev.D). All the boards are missing power to the USB-port. Data signals are good and everything is working if I'm using powered USB-hub. OTG-port is working normally.

Voltage regulator (U9, SY6280AAC) for the port needs enable signal (USB1-DRV in the schematic) to the pin 4 to turn on. This signal stays low and regulator stays off.

Enable signal for the OTG-port regulator is high as expected.

Is this software or hardware problem? And how to fix it?

Image used is
http://images.olimex.com/release/a64/A64-OLinuXino-bionic-minimal-20200417-104700.img.7z

Title: Re: USB has no power
Post by: LubOlimex on May 11, 2020, 11:10:47 AM

The latest release of A64 images are not yet stable. In order to rule out software problem can you also test with these two older images:

ftp://staging.olimex.com/Allwinner_Images/a64-olinuxino/linux/1.latest_images/bionic/images/

Let me know how it goes.

Title: Re: USB has no power
Post by: Noone on May 11, 2020, 02:36:59 PM

I tried with
ftp://staging.olimex.com/Allwinner_Images/a64-olinuxino/linux/1.latest_images/bionic/images/Armbian_5.92.1_Olinuxino-a64_Ubuntu_bionic_next_5.2.5_desktop.7z

USB is working normally with that image. Thank you.

Title: Re: USB has no power
Post by: LubOlimex on May 12, 2020, 09:04:26 AM

Thank you for the update, I've notified the developers in order to resolve it in the Olimage image.

Olimex Support Forum

OLinuXino Android / Linux boards and System On Modules => A64 => Topic started by: Noone on May 11, 2020, 10:06:38 AM