AM625: AM6254 USB OTG function

Hello Cayden

Thank you for the query.

cayden liu said:

I`d like to know whether all of two USB didn`t support OTG?

I assume you meant USB0 and USB1. This is correct. Both USBs do not support OTG.

Regards,

Sreenivasa

well received.

Many thanks!

BR

Cayden

BTW, could USB0 and USB1 support OTG if customer code driver files by themselves?

BR

Cayden

Hello Cayden

Thank you 

Please refer the schematics review checklist. The link is available in the below FAQ.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1183910/faq-am625-custom-board-hardware-design-collaterals-to-get-started

7.3.2 Universal Serial Bus (USB2.0)
The processor provides 2 X USB2.0 interfaces that can be configured as host or device or DRD (Dual-Role
Device).
USBn_VBUS (n=0..1) is recommended to be connected in accordance with the USB Design Guidelines
section of the device-specific data sheet. The supply voltage range for the USBn_VBUS pins is defined in
the Recommended Operating Conditions section of the device-specific data sheet. The nominal voltage value
applied is equal to the resistor divider output when VBUS supply voltage level is 5 V.
USBn_ID functionality is supported via any of the processor GPIO.

Regards,

Sreenivasa

Hi Cayden,

cayden liu said:

BTW, could USB0 and USB1 support OTG if customer code driver files by themselves?

Do you really mean to the true OTG protocols? What is the USB usecase?
For more than a decade I haven't hear any customer using OTG protocols on any TI processor.

Hi Bin, Sreenivasa, 

So sorry. I have confirmd with customer this morning. Customer requirements as following:

It operates in slave mode when there are no USB equipment inserted. When a U disk (or other USB equipment) is inserted, it automatically switches to master mode.

Could DRD mode achieve this function?

BR

Cayden