STM32F042 USB - what is ''Activate OE''?

[qwer.asdf]

Posted on October 20, 2015 at 13:40

There is an ''Activate OE'' checkbox in STM32CubeMX is USB section of the tree which enables a ''USB_OE'' pin on PA4. I can't find any occurrence of USB_OE either in datasheet or reference manual. Can anybody tell me what is it?

Thanks.

[waclawek.jan]

Posted on October 20, 2015 at 14:03

> I can't find any occurrence of USB_OE either in datasheet or reference manual.

Maybe because it's USB_NOE... So much about Cube's consistency with the manuals.

RM0091, Ch.30.4.1:

The output enable control signal of the analog transceiver (active low) is provided externally

on USB_NOE. It can be used to drive some activity LED or to provide information about

the actual communication direction to some other circuitry.

JW

[qwer.asdf]

Posted on October 20, 2015 at 14:11

Thank you, Jan.