Novatel OEM6 Integration Manual

Also see for OEM7 SPAN: User manual Installation and operation user guide Installation and operation manual Installation and Operation User Manual

Contents

Novatel OEM6 Integration Manual Manual pdf 168 page image

Chapter 3 New for OEM7 – HardwareOEM6 to OEM7 Integration Guide v1 168Designator Manufacturer Manufacturer Part NumberFB1, FB2 TDK MMZ1005B800CU1 Texas Instruments SN65HVD231QDU2 Bourns CDNBS08-PLC03-6Table 68: CAN Transceiver Example Bill of Materials (critical components)3.5.5 USB InterfaceOEM7 receivers include one USB 2.0 device interface capable of either Full-Speed (12Mb/s) orHigh-Speed (480Mb/s) transfer rates. On the OEM719 and OEM729 receivers, the default trans-fer rate for the USB Device port is Full-Speed (12Mb/s). The USB device interface on theOEM7700 receiver is set for a default of High-Speed (480Mb/s). The device interface will notauto-negotiate the speed with the Host computer. However, the speed of the device interfacecan be changed using the USBCONFIG command and SAVEUSBCONFIG command.It is imperative for signal integrity and EMI reasons that the differential data traces be routed asa 90Ω differential pair. Use of a small-value common-mode choke (as shown in Figure 7: OEM7USB Device Interface Example below) may improve the radiated emissions performance (butshould not be necessary).Any stubs on the traces must be kept as short as possible and it is strongly recommended not tochange reference planes. Match the USB differential pair (D+ and D- trace lengths) to within3mm or less.The common-mode choke and ESD protection should be placed as close as possible to the USBconnector (J1).Figure 7: OEM7 USB Device Interface Example