Connecting the USB Type-C cable creates a current path from 5-V supply to ground.
If no cable is attached, the source sees a logic high at CC1 and CC2 pins. The DFP pulls up the CC1 and CC2 pins through the Rp resistors but the UFP pulls them down through Rd. UFP denotes Upstream Facing Port which is the device connected to the host or the power consumer. In this figure, DFP stands for Downstream Facing Port which is the port acting as either the host in data transmission or the source for power. These pins could be also used for the communications required by the Power Delivery and Alternate Mode.įigure 4 below shows how the CC1 and CC2 pins reveal the receptacle/plug orientation. They perform a number of functions such as cable attachment and removal detection, receptacle/plug orientation detection, and current advertisement. These pins are the Channel Configuration pins. These functionalities may utilize even all of the available RX/TX differential pairs. In such cases, the RX/TX pairs are not used by the USB 3.0/3.1 connectivity and could be used by other USB Type-C functionalities such as the Alternate Mode and the USB Power Delivery protocol. Note that a USB Type-C port could support USB 3.0/3.1 standards but the minimum feature set of USB Type-C doesn’t include USB 3.0/3.1. Since the connector is flippable, a multiplexer is required to correctly re-route the data on the employed differential pairs through the cable. One of these two RX pairs along with a TX pair could be used for the USB 3.0/USB 3.1 protocol. There are two sets of RX differential pairs and two sets of TX differential pairs. You can charge both of your smartphone and notebook using the same cable. Note that the power delivery technology makes USB Type-C more versatile than the older standards because it makes the power level adaptable with the needs of the load. Figure 3 shows an example from RICHTEK where a buck-boost converter is used to generate the appropriate voltage requested by the notebook computer. The high power flow could be useful when charging a large device such as a notebook computer. Hence, the USB Type-C could deliver a maximum power of 100 W. The maximum current could be also raised up to 5 A. The Power Delivery allows VBUS to have a voltage up to 20 V.
The default VBUS voltage is 5 V but the standard allows the devices to negotiate and choose a VBUS voltage other than the default value. The VBUS and GND pins are power and the return paths for the signals. The redundancy is included only to provide a flippable connector. However, the pins are connected to each other and there’s actually only one USB 2.0 data differential pair available for use. There are two D+ pins and two D- pins in the receptacle. The D+ and D- pins are the differential pairs used for the USB 2.0 connectivity. Figures 1 and 2, respectively, show the pins for the USB Type-C receptacle and plug.įigure 1. In the following sections, we’ll see how these features are provided by the USB Type-C standard. It allows the devices to negotiate and choose an appropriate level of power flow through the interface.Moreover, it can support third-party protocols such as DisplayPort and HDMI in a mode of operation called Alternate Mode. It supports USB 2.0, USB 3.0 and USB 3.1 Gen 2 standards.The interface is designed in a way that the plug can be flipped relative to the receptacle. The USB-C interface has three main features: Though USB-C is more commonly used, USB Type-C is the official name of the standard as listed on USB.org. These two terms are generally interchangeable (we'll use both throughout this article). These features can make the USB-C a truly universal connectivity standard for the modern devices. The USB-C is a relatively new standard which aims to provide high-speed data transfer up to 10Gb/s along with power flow capability of up to 100W. Before diving into the pinout and explaining what each is capable of, we'll quickly take a high-level view of what USB-C is and what it's best at. This introductory article will look at some of the most important features of the USB-C standard. Unlike its USB predecessors, it's also flippable-so you don't need to try three times to plug it in.Ī USB Type-C port. USB Type-C is a specification for a USB connector system that is gaining popularity across smartphones and mobile devices and is capable of both power delivery and data transmission. Do you know your way around a USB Type-C connector? This article lays out the anatomy of the USB Type-C pinout and briefly touches on its various modes.
0 kommentar(er)
