Answer
The m.2 used on our Wi-Fi modules is an E-key. Review the PCI Express M.2 Specification from the PCI-SIG website for more information.
- Here is an Application note on E-Key from NXP
- When using an m.2 Wi-Fi module ensure your platform supports the interface by the selected m.2 Wi-Fi module. An example is an external sleep clock which is needed by some Ezurio (formerly Laird Connectivity) modules.