There is detailed information about the Intel 300-series
With the release of 10-nanometer of processors of Intel of Coffee Lake Coffee Lake and S-H will be synchronized release of a new series of chipsets — PCH Cannonlake, which will be consolidated in a 300 series. Source has published detailed information about these chipsets.
Cannonlake PCH configuration includes two controller Alpine Ridge so that the motherboard on this chipset can have up to four USB ports. the Exact number of PCIe lanes is still unknown, but they will be quite a lot. Part of a dedicated PCIe SSD, installed in two slots M. 2. Expansion slots PCIe 3.0 and x4 3.0 x1 will also be provided at the expense of resources PCH. You can also note the presence of two USB 3.1 ports, three SATA 6 GB/s, Gigabit Ethernet, audio codec, and support for the SD slot, fingerprint sensor, NFC, touch screen controller wireless (WiGig, Wi-Fi and Bluetooth).