§ 1. 5 Universal Serial Bus USB

Bytes§ 1. 4 AGP graphic acceleration Port§1.5 Universal Serial Bus USBBytes§ Performance and selection of Bus

At present, in the microcomputer system, various peripherals used to expand computer functions are constantly appearing. Correspondingly, the ports on the chassis are getting increasingly tight. Because of the lack of a two-way, inexpensive bus that supports medium and low-speed peripherals, it hinders the further development of peripheral devices such as modem, scanner, keyboard, mouse, and so on, the existing technologies are used intelligently to meet the needs of one or two products. To support peripherals with new features, you must add a new interface to the chassis to address them. Can we use new technologies to simplify port expansion and adapt to future development needs? Can we propose a new technology to connect computers and communication devices? As a result, seven companies, including Compaq, digital equipment, IBM, Intel, Microsoft, NEC, and Northern Telecom, proposed USB.
USB is fully called the Universal Serial Bus. Universal Serial Bus It is a fast, bidirectional, synchronous transmission, cheap, and hot swappable serial interface that is compatible with the development of today's computers. In short, USB technology is an industrial standard for expanding the PC architecture to realize the integration of computer and communication.

Understand the basic concepts, performance advantages, basic equipment and architecture of the USB Bus to form an overall impression of the USB bus.

§ 1. 5.1 USB meaning and purpose § 1. 5.2 USB Layout
1. 5.3 USB devices § 1. 5.4 USB features
Universal Serial Bus, peripherals, layout, and synchronization bandwidth
USB system composition and topology are important; Difficulties are: USB layout.

interval § 1. 4. AGP graphic acceleration port § 1. 6. Performance and selection of bus / span>