I am working on a PAD which to use the IMX6D processor. There is a wifi module which a PCIe interface connected to mini PCIe interface of the IMX6D. The system was crash every several hours when the wifi module connected to main board. The system didn't crash if don't to connect the wifi module. I have check the power of the system and it no problem. Does anyone see this issue or the similar issues？ How solve this issue？ Thanks.