USB self powered device VBUS monitor | Cypress Semiconductor
USB self powered device VBUS monitor
The USB module data sheet mentions that an SIO pin can be used as a VBUS monitor by connecting it directly to VBUS. Are there any other considerations when connecting an SIO to this 5V source when everything else on the psoc3 is running at 3.3V? I was thinking of just adding transient protection to the line the same as I do with D+ and D-.