Chapter 2 – Hardware Information 11Carrier Board UP 4000 M.2 PlusPin Signal Description Pin Signal Description43 PCIE_ RXN 44 NC45 GND 46 NC47 PCIE_Clock_P 48 NC49 PCIE_Clock_N 50 Suspend clock51 GND 52 WIFI_RST#53 M.2 Clock request 54 Bluetooth enable (internal pullhigh to 3.3V)55 PCIe Wake 56 Wi-Fi enable (internal pull highto 3.3V)57 GND 58 NC59 NC 60 NC61 NC 62 NC63 GND 64 NC65 NC 66 NC67 NC 68 NC69 GND 70 NC71 NC 72 +3.3V73 NC 74 +3.3V75 GND 76 GND77 GND H1 NCH2 NC - -