We meet problem when porting wifi Ampak AP6356.
The interface is PCIE interface.
It is known that the voltage level of the RST signal must be obtained 1.8V at the high level for the CPU of the PCIe interface.
The RST signal close to the CPU side with the open terminal to be measured, which is obtained the voltage level is lower than 1.8V at the high level as the following figure for our layout of the board.
We want to understand any chance can implement the voltage level to reach 1.8v?
The following is the measured result for your reference.