Type-C technical characteristics
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Type-C technical characteristics
The five main features of Type-C make USB Type-C a flexible and scalable interface.
1, power supply
The default 5V power supply of the USB Type-C interface is backward compatible with the previous USB interface. Not only that, the new USBType-C interface consists of four pins dedicated to power and ground. The "USB Power Delivery Specification" allows the USB Type-C interface to support up to 20V and 5A.
2, symmetric connection
The USB Type-C interface is symmetrical, so its plugging and unplugging and cable orientation are both positive and negative. The liberation of the plug-in direction solves the main troubles brought by the previous interface. The type of the previous interface indicates the function of the attached device (Type-A interface is used for the host and Type-B interface is used for the external device). The USBType-C interface can access either end, and the functionality is defined by the hardware being accessed. The interfaces on both ends of the USBType-C cable are the same, so the plugging and unplugging of the cable is simplified.
3, bandwidth
USB Type-C supports USB 2.0, USB 3.1 Genl (SuperSpeed USB 5Gbps) and USB 3.1Gen2 (SuperSpeed USB 10Gbps) data transfer rates. USB 2.0 and USB 3.1 are defined by separate specifications. SuperSpeed USB differential signal pairs are assigned on both sides of the interface, so a set of SuperSpeed USB signal transmission connections is used when inserting the interface in either direction.
4, channel configuration
The USB Type-C interface contains two Channel Configuration signal pins (CC1 & CC2) for function negotiation. The above signals determine the direction in which the interface is inserted and are used to negotiate the power supply function, the alternate mode, and the peripheral mode on the interface.
5, non-USB signal transmission
The USB Type-C interface supports a variety of OEM product customization modes to extend device functionality. Signal redistribution is achieved through negotiation on the CC channel. The interface can enter two modes, peripheral mode and alternate mode. To enter peripheral mode, a simple logic check is performed on the CC channel to determine which peripheral mode is required. To enter the alternate mode, Biphase Mark Code (BMC) is used on the CC channel for two-way communication to properly set the link. During this negotiation, the devices at both ends need to agree on the redistribution of the signal before making any changes. All USB Type-C interfaces are required to be used as a USB compatible interface in non-replacement mode or non-peripheral mode.