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Usb-if authentication
发布日期：2021-11-06阅读量：657发布者：超级管理员
Introduction of usb-if certification
USB - is the abbreviation of universal serial bus (USB), and its Chinese abbreviation is "serial line"; It supports plug and play and hot plug function of the device. USB was developed by Intel, NEC, Compaq, Dec, IBM in 1994 (Microsoft and Northern Telecom jointly proposed and formulated the usbv version 0.7 on November 11, 1994, which has been developed to version 3.1. USB has the advantages of fast transmission speed, convenient use, hot plug support, flexible connection, independent power supply, etc.; and USB authentication is also called usb-if authentication, which is USB implementers Forum (usb-if) The implementation of a voluntary landmark certification.
USB standard type
1、Connector USB2.0 standard type: USB type a male head and type a female seat; USB B-type male and B-type female base; Mini USB male and female base; Micro USB male and female base; USB3.0 standard type: USB type a male head and type a female seat; USB B-type male and B-type female base; Micro USB male and female base; Usb3.1 standard type: type C male head, type C female seat; 2、Cable USB2.0 standard types: USB a to B, USB to minib, USB a to microb USB3.0 standard types: USB a to a, USB to B, USB a to microb
Usb3.1 standard type: type C to type C
Usb-if certification test content
The authentication test of USB peripherals can be divided into three categories. The first is the electrical characteristic test to verify the signal quality of the product under different application architectures. This is followed by functional testing, which examines higher-level product details, such as support for standard requirements and device listing functions. Finally, the product interoperability test is used to determine the interaction between the tested product and other USB devices.
Why USB authentication
USB authentication is generally based on the requirements of the client. USB functions used on high-end products generally need to apply for USB certification. After applying for the certification of the association, USB products can use the USB logo to obtain the TID number of USB products. If USB products want to use this logo and have a TID number, they must first apply to the USB association to become their members, and then they can apply for component certification.
