In TUSB8043AIRGCR datasheet, it is mentioned to use 1.8V clock signal for input clock in XI pin of USB hub. but the ViH value for 1.8V clock signal / I/o signal is not mentioned.
The vih value mentioned in the datasheet is only for 3.3V logic levels. i need to know the ViH, ViL values for 1.8V input siganls of the USB hub.
