There are three types of USB interfaces according to major categories, namely type-A (interface for plugging in mouse, keyboard and USB flash drive on the computer), type-B (common in printers and monitors with touch and USB interfaces), type-C (supports insertion in both forward and reverse directions); and there are seven subdivisions, namely Standard type-A, Mini type-A, Micro type-A, Standard type-B, Mini type-B, Micro type -B,type-C.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
Universal Serial Bus (English: Universal Serial Bus, abbreviation: USB) is a serial bus standard and a technical specification for input and output interfaces. It is widely used in information such as personal computers and mobile devices. Communication products, and expanded to photographic equipment, digital TV (set-top boxes), game consoles and other related fields.
How many types of usb interfaces are there?Answer: According to major categories, there are three types of USB interfaces, namely type-A, type-B, and type-C. Broken down, there are seven types, namely Standard type-A, Mini type-A, Micro type-A, Standard type-B, Mini type-B, Micro type-B, and type-C.
The breakdown is as shown in the figure below:
The following is a detailed introduction to these interface classifications of USB.
The usb interface can be roughly divided into usb type A, usb B type and usb C type, and usb type A and usb B type can be divided into standard, small and micro according to their shapes. Therefore, in general Generally speaking, the interface shapes of USB are roughly as follows: standard USB type A, small USB type A, micro USB type A, standard USB B type, small USB type B, micro USB B type and USB C type.
Type-A is the one we usually use most, mini-a and micro-a have basically been eliminated; type-B is usually used to connect printers and is still widely used. The type-c interface is also the most widely used USB interface type at present. Since the type-c interface supports reversible plugging, it has more advantages than the previous type-a or type-b. Therefore, type-c interfaces are currently widely used in USB interfaces on mobile phones. -c usb interface.
type-A
Type-A is our most common large port, the interface for plugging in the mouse, keyboard, and U disk on the computer. At present, the mainstream interface has adopted the USB3.0 interface, and the theoretical speed reaches 4Gbp/s. Some new host motherboards adopt USB3.1 or even USB3.2, and the transmission speed can reach 10Gbp/s, which is almost as fast as taking off.
type-B
TypeB interface: Commonly found in printers and monitors with touch and USB interfaces, with low daily use frequency.
MircoB is divided into MicroB 2.0 and MicroB 3.0. The difference in appearance is that MicroB3.0 is based on the 2.0 interface and has a wider interface. The MicroB 2.0 cable can be plugged into the MicroB 3.0 port, but not vice versa.
MicroB 2.0, which has a narrower interface, is USB2.0 speed and is common in most Android and WP mobile phones in 2014 and before, as well as in very few current brands of mobile phones.
USB Type-B connectors are used in large devices, most commonly printer devices, and since these are relatively large connectors, they are rarely seen in portable consumer devices.
type-C
USB Type-C is a USB interface standard. It has a smaller size than Type-A and Type-B and can be used in PC (master device) can in turn be applied to the interface type of external devices (slave devices, such as mobile phones).
USB Type-C has 4 pairs of TX/RX lines, 2 pairs of USBD/D-, a pair of SBU, 2 CC, 4 VBUS and 4 ground lines.
On October 4, 2022 local time, the European Parliament passed a bill with an overwhelming majority. The bill stipulates that from the end of 2024, all new portable smart devices must use the USB Type-C charging interface; from 2026, USB Type-C will also become the standard interface for laptop chargers. In October 2022, Apple confirmed on the 25th that it will comply with EU requirements and all smartphones will use USB-C charging ports from 2024.
Advantages:
The TYPE-C hardware interface has obvious characteristics, mainly including the following points:
(1) Supports forward and reverse symmetrical plugging and unplugging, solving the problem of reverse plugging in practical applications;
(2) The interface is slim and can support thinner and lighter devices, making the design of portable devices thinner and smaller; (3) Support higher power transmission, up to 100 watts, and support more high-power load equipment.
(4) Support single port and dual port TYPE-C, flexible application.
(5) Supports two-way power transmission, both sending and receiving power.
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