[K20D50M]: Is USB Device D+ High in VLPS Mode?

[huishao2]

Hi-

I have a question regarding D+ status when K20D50 is in VLPS low power mode:

is it still high when K20 enters stop mode?

Thanks!

Hui

[jeremyzhou · Accepted solution]

Hi Hui,

According to the reference manual, when the USBOTG module enter the low-power mode, its status will move to the Suspend mode.

While in the Suspend state, a device must continue to provide power to its D+ ( full/high-speed ) or D- ( low-speed ) pull up resistor to maintain an idle so that the upstream hub can maintain the correct connectivity status for the device.

Hope it helps.
Have a great day,
Ping

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------