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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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?
Statistics: Posted by danedwards_ee — Tue Apr 09, 2024 8:31 pm — Replies 1 — Views 12