To convert an existing USB 2.0 host to USB Type-C, Vbus for each port must be switchable.Īdditionally, pull-up resistor(s) and the capability to detect one of the device pull-down resistors must be added. Only when a device pull-down resistor is detected does the host enable Vbus to the device. Enabling Vbus at all times will cause two host Vbus supplies to be shorted. A USB Type-C host cannot enable Vbus at all times like a Type-A host. The USB Type-C cable allows two hosts to be connected together. The device waits for Vbus to be valid, enables it’s D+ pull-up resistor (for a Full Speed or High Speed product), Chirps (if High Speed device) and USB enumeration occurs as normal. To convert an existing USB 2.0 device to Type-C, the designer must add two pull-down resistors to the CC pins and route the USB D+/D- signals to both positions on the Type-C receptacle. USB Type-C is a framework for the future and continued success, usefulness and relevance of USB for the next 10 to 20 years. USB Type-C is not only a new mechanical connector. However, USB Type-C is a separate specification and is applicable to all USB products and operating speeds. The USB Type-C specification was released at the same time as a major update to the USB 3.1 specification. The “U” in USB does indeed mean “Universal.” Lastly, the new USB Type-C alternate mode allows TV sets, displays and docking stations to share or take over the USB cable. USB Type-C connectors also support analog audio and can replace a standard headphone connector. Power Delivery could end the tyranny of “9 different power supplies for 11 different products” in the same way that standardized USB charger is now used to recharge many phones, tablets, e-readers, and other portable devices. The USB Power Delivery feature allows products like laptops to be powered from a monitor. It defines a number of new capabilities starting with support for Power Delivery. USB Type-C is more than just a new connector.
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