USB VBUS detect threshold

What voltage is required on the USB0_VBUS_DET pin for the module to assume that external VBUS is available? I was unable to find this information in either the data sheet or the OEM product design guide.

Hi, it is typical 1.6v, range is 1.1v ~ 2.1v

[EDIT] In fact, there is a level shift (NMOSFET) in module to convert voltage of pin B37 to 1.8V level. The Vgs(th) of it is typical 1.6V and range is 1.1V ~ 2.1V, the max Vgs is +/-20V.