USB Host connectivity limitation

  • By default the number of devices connected to the USB host interface is limited due a memory restrition (~5 devices). This is related to all Windows Embedded CE/Compact kernel images. To solve this you need to increase the PhysicalPageSize value in registry:

    PhysicalPageSize=dword:10000 ; default value

    A value of 0x40000 (256KB) should be sufficient:

    1. reg open \Drivers\Builtin\OHCI
    2. reg set val PhysicalPageSize dword 0x40000
    3. reg save

    Software developer, F&S Elektronik Systeme GmbH
    As this is an international forum, please try to post in English.
    Da dies ein internationales Forum ist, bitten wir darum, Beiträge möglichst in Englisch zu verfassen.