Hello,
With two designs of a custom carrier board now, we have faced issues where the CM4 (with eMMC) is not showing as a valid device over USB.
We are using the same design as with the CM4 IO board, albeit not pulling the USB_OTG_ID pin high with the USB_VBUS Vdiv. But the USB_OTG_ID pin is high when attempting the flash.
Pulling nRPI_BOOT to GND and providing the board power over USB, or externally. Will pop up a USB error on the Windows 11 computer.
SEL pin on the MUX is 2V5. D+/D- are not swapping sides at any point.
Is there something obvious I am missing here?
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Image may be NSFW.
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Image may be NSFW.
Clik here to view.
With two designs of a custom carrier board now, we have faced issues where the CM4 (with eMMC) is not showing as a valid device over USB.
We are using the same design as with the CM4 IO board, albeit not pulling the USB_OTG_ID pin high with the USB_VBUS Vdiv. But the USB_OTG_ID pin is high when attempting the flash.
Pulling nRPI_BOOT to GND and providing the board power over USB, or externally. Will pop up a USB error on the Windows 11 computer.
SEL pin on the MUX is 2V5. D+/D- are not swapping sides at any point.
Is there something obvious I am missing here?
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Statistics: Posted by danedwards_ee — Tue Apr 09, 2024 8:31 pm — Replies 1 — Views 12
