On our T20 based board is an USB hub (Microchip USB2514B). An external USB touch controller is connected to one of the downstream ports of the hub.
While a warm- or coldboot the hub switches off the USB-power (VBUS, 5V) for about 220 ms. This time interval is too short for the voltage to go down properly and the USB touch controller hangs up.
Is there any way to extend the power-off time?