Usb Type C Authentication Dev Board

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This topic is intended for OEMs who want to build a Windows 10 system with USB Type-C connector and want to leverage OS features that allow for faster charging, power delivery, dual role, alternate modes, and error notifications through Billboard devices.

A traditional USB connection uses a cable with a USB A and USB B connector on each end. The USB A connector always plugs in to the host side and the USB B connector connects the function side, which is a device (phone) or peripheral (mouse, keyboard). By using those connectors, you can only connect a host to a function; never a host to another host or a function to another function. The host is the power source provider and the function consumes power from the host.

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The traditional configuration limits some scenarios. For example, if a mobile device wants to connect to a peripheral, the device must act as the host and deliver power to the connected device.

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The USB Type-C connector, introduced by the USB-IF, defined in the USB 3.1 specification, addresses those limitations. Windows 10 introduces native support for those features.

Feature summary

  • Allows for faster charging up to 100W with Power Delivery over USB Type-C.
  • Single connector for both USB Hosts and USB Devices.
  • Can switch USB roles to support a USB host or device.
  • Can switch power roles between sourcing and sinking power.
  • Supports other protocols like DisplayPort and Thunderbolt over USB Type-C.
  • Introduces USB Billboard device class to provide error notifications for Alternate Modes.

Official specifications

Hardware design

USB Type-C connector is reversible and symmetric.

The main component are: the USB Type-C connector and its port or PD controller that manages the CC pin logic for the connector. Such systems typically have a dual-role controller that can swap the USB role from host to function. It has Display-Out module that allows video signal to be transmitted over USB. Optionally it can support BC1.2 charger detection.

Consider recommendations for the design and development of USB components, including minimum hardware requirements, Windows Hardware Compatibility Program requirements, and other recommendations that build on those requirements.Hardware component guidelines USB

Choose a driver model

Use this flow chart to determine a solution for your USB Type-C system.

If your system..Recommended solution..
Does not implement PD state machinesWrite a client driver to the UcmTcpciCx class extension.
Implements PD state machines in hardware or firmware and support USB Type-C Connector System Software Interface (UCSI) over ACPILoad the Microsoft provided in-box drivers, UcmUcsiCx.sys and UcmUcsiAcpiClient.sys.

See UCSI driver.

Implements PD state machines in hardware or firmware, but either does not support UCSI, or support UCSI but requires a transport other than ACPIWrite a client driver for the UcmCx class extension.
Implements UCSI but requires a transport other than ACPIWrite a client driver to the UcmUcsiCx class extension.

Use this sample template and modify it based on a transport that your hardware uses.

Bring up drivers

  • USB Function driver bring-up is only required if you support USB Function mode. If you previously implemented a USB Function driver for a USB micro-B connector, describe the appropriate connectors as USB Type-C in the ACPI tables for the USB Function driver to continue working.

    For more information, see instructions about writing a USB Function driver.

  • USB Role-Switch driver bring-up is only required for devices that have a Dual Role controller that assumes both Host and Function roles. To bring-up the USB Role-Switch driver, you need to modify the ACPI tables to enable the Microsoft in-box USB role-switch driver.

    For more information, see the guidance for bringing up the USB Role Switch Driver.

  • A USB Connector Manager Driver is required for Windows to manage the USB Type-C ports on a system. The bring-up tasks for a USB Connector Manager driver depend on the driver that you choose for the USB Type-C ports: The Microsoft in-box UCSI (UcmUcsiCx.sys and UcmUcsiAcpiClient.sys) driver, a UcmCx client driver, or a UcmTcpciCx client driver. For more information, see the links in the preceding section that describe how to choose the right solution for your USB Type-C system.

Test

Perform various functional and stress tests on systems and devices that expose a USB Type-C connector.

Test USB Type-C systems with USB Type-C ConnEx - Run USB tests included in the Windows Hardware Lab Kit (HLK) for Windows 10.

Run USB function HLK tests with a C-to-A cable (search for Windows USB Device in the HLK

Certification/ComplianceAttend Power Delivery and USB Type-C compliance workshops hosted by the standards bodies.

See also

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Possible causes and resolutions to troubleshooting messages in Windows 10 that users might get on USB Type-C systems running Windows.

The symmetric and reversible design of the USB Type-C connector allows users to connect systems running Windows to connect any USB Type-C device, and use new features such as enhanced charging and alternate modes. However, certain combinations of hardware and/or software limitations might prevent some of these features from functioning properly. Windows 10 provides a set of USB Type-C notifications to help users troubleshoot these issues.

In this topic, a USB Type-C system refers to a PC running Windows 10 for desktop editions (Home, Pro, Enterprise, and Education) or a mobile device running Windows 10 Mobile.

Troubleshooting messages related to USB Type-C connectors of a system

You might be able to fix your USB device

**Your USB device ran into a problem. Follow these steps to try to fix it. (Error code ____) **

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Possible causeRecommended resolution

The device hardware reported a problem or the device driver is faulty.

  1. Note the error code.
    • On Windows 10 for desktop editions systems, open Device Manager and find the device. It's marked with a yellow exclamation point. Right-click on the node and open device properties. The error code is under Device status.
    • On Windows 10 Mobile systems, the notification shows the error code.
  2. Follow the troubleshooting steps described in this article.
Note Applies to all error codes shown in Device Manager except for Code 28.

Device is charging slowly

To speed up charging, use the charger and cable that came with your device.

Possible causesRecommended resolution
  • The charger is not compatible with your system.
    Note Non-USB Type-C chargers support the USB Battery Charging 1.2 specification. Some of these chargers use proprietary charging mechanisms. Your system might not support all those chargers.
  • The charger is not powerful enough to charge the system.
  • The charger is not connected to a charging port of the system.
  • The charging cable does not meet the power requirement of the charger or the system.
Note

A system with USB Type-C connectors has higher power limits, it can support up to 5V, 3A, 15W. If the connector supports USB Power Delivery (industry standard), it can charge faster at higher power levels.

In order for you to get the fast charging benefits, your system, charger, and cable must support the industry standards. In addition, your charger and cable must support the power levels required by the system to optimally charge it. For example, if your system requires 12V and 3A for charging, a 5V, 3A charger cannot charge your system optimally.

  • Use the charger and cable that came with your device.
  • Make sure that you're connecting your charger to the charging USB Type-C port on your system.

The USB device might not work

Try connecting it to a PC.

Possible causeRecommended resolution

The driver for the connected device is not supported on the version of Windows running on the system. For information about the supported devices, see USB device class drivers included in Windows.

Note A mobile system has the capability to connect with other USB peripherals. However, not all devices that connect to a PC can connect to a mobile system. Check the preceding list to the supported devices.
  • Make sure that you are running the latest version of Windows so that you have most recent driver packages. For information, see Windows 10 Updates.
  • If you are already running the latest version, try connecting your device to a PC instead.

Try improving the USB connection

Make sure the device you are connecting to is supported and you are using the right cable.

Possible causeRecommended resolution
  • You have connected a device with new USB Type-C features that not supported by your system.
  • You have connected a device with new USB Type-C features that is not supported by the cable.

USB Type-C introduces a new feature called alternate modes, which allows non-USB protocols to run over the USB Type-C cable. For example, a dock that uses alternate modes has the ability to transmit a video signal over USB.

In order for an alternate mode to work, the hardware and the software on the PC/phone and the device or adapter must support the alternate mode. In addition, certain alternate modes may require specific USB Type-C cables.

  • Make sure your system supports the features of the connected device.
  • Make sure your cable supports the features of the connected device.

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Display connection is limited

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DisplayPort/MHL connection might not work. Try using a different cable.

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Possible causeRecommended resolution
  • You have connected a device with new USB Type-C features that are not supported by your system.
  • You have connected a device with new USB Type-C features that are not supported by the cable.

USB Type-C introduces a new feature called alternate modes. The feature allows non-USB protocols to run over the USB Type-C cable, while simultaneously preserving USB 2.0 and charging functionality. Here are the display alternate modes:

  • DisplayPort /DockPort

    This alternate mode allows the user to project audio/video to external DisplayPort displays over a USB connector.

  • MHL

    The MHL alternate mode is allows the user to project video/audio to external displays that support MHL.

The hardware and software on the system, the device or adapter, or cable does not support the DisplayPort /DockPort or MHL alternate modes.

  • Make sure the system, device, and cable support DisplayPort /DockPort or MHL alternate modes.

These two PCs (mobile devices) can't communicate

Try connecting one of them to a mobile device (PC) to achieve your goal.

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Possible causeRecommended resolution
  • You cannot connect two PCs running Windows 10 for desktop editions.
  • You cannot connect two mobile devices running Windows 10 Mobile.
This connection scenario is not supported.