Hello, community
The i.MX8QXP has TWO USB OTG ports.
According to the IMX8QXP DataSheet (Rev.0),
VBUS (OTG2) -0.3~3.63V : (VBUS level is limited to 3.3V)
VBUS (OTG1) -0.3~5.5V : (VBUS level is limited to 5V)
But p100, Table 101 (USB 2.0 PHY OTG comparator specifications) list only one type of vbusvalid.
That is , min 4.4V to max 4.75V. It looks like vbusvalid in OTG 1.
Please let me know What about vbusvalid in OTG 2?
Best Regards,
kanou
Solved! Go to Solution.
Hello,
Both i.MX8 USB_OTGx_VBUS pins are voltage detector only, not for the PHY
power supply, therefore customers can apply a resister divider or a converter
from 5V to 3.3V for the OTG2, assuming VBUS Valid threshold is changed
proportionally.
Have a great day,
Yuri
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Yuri-san,
I think that vbusvalid is the voltage related USB PHY.
Therefore, I thought that it was 4.4V - 4.75V.
What is vbusvalid?
Hello,
We cannot apply voltages higher, than 3.3 V to the OTG2_VBUS.
Regards,
Yuri.
Hi, Yuri,
Thanks for your reply.
It mean, OTG2 VBUS Valid Threshold is same as OTG1 value, right?
i.e. 4.4V ~ 4.75V
BR,
kanou
Hello,
I think: 2.9 V - 3.135 V
Regards,
Yuri.
Hello,
Both i.MX8 USB_OTGx_VBUS pins are voltage detector only, not for the PHY
power supply, therefore customers can apply a resister divider or a converter
from 5V to 3.3V for the OTG2, assuming VBUS Valid threshold is changed
proportionally.
Have a great day,
Yuri
------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer
button. Thank you!