在任何USB 系统中只有一个主机，主机的每个USB控制器（Host Controller）对应一条USB总线。与主机计算机系统相连的USB接口被称为主机控制器。 主机控制器可以以硬件，固件或软件的组合来实现。 根集线器（root hub）集成在主机系统内以提供一个或多个连接点。

本文将介绍使用ROHM的USB HOST音频解码器BU9437AKV和NEC的16位单片机uPD1166组成的数字音频系统的设计实例。BU9437支持MP3和WMA文件解码，具有上面所述的USB HOST音频解码芯片的所有功能。 随着MP3、WMA等数字音频的流行，以及大容量存储介质的迅速发展，一种新的可 ...

USB应用的比较广泛，从 USB 0.1版本到现在的 UBS 4，经历了各项技术的升级。 USB：Universal Serial Bus，通用串行总线。 USB最初由英特尔与微软倡导发起，最大的特点是尽可能的实现热插拔和即插即用。 USB总线是差分信号吗？ 什么是USB 2.0、USB 3.0？ 什么是低速、全速 ...

Many devices need to be connected to a high-speed port to work properly and so in this article, we will show you how to install a high speed USB host controller. When connecting a USB 2.0 device, ...

In a USB function – an embedded device with a USB interface – there is a USB peripheral controller chip. As shown in Figure 2, this chip has two key functions: it interfaces to the USB system ...

There is no doubt that, since the introduction of USB over 20 years ago, personal computers have become easier to use. Adding a peripheral device is usually straightforward for even the most ...

The Universal Serial Bus (USB) is a proven connectivity system. However, there are still design challenges in producing a USB hardware interface. Prime among these are face layout, power, and ...

Since the ESP8266 came on the scene a few years ago and revolutionized the way microcontrollers communicate with other devices, incremental progress on this chip has occurred at a relatively even pace ...

The USB specification introduced a simple and inexpensive infrastructure for easily connecting multiple external peripherals to a PC. That was several years ago; today, more than 500 million ...

The easiest way to connect computer peripherals is through a Universal Serial Bus (USB). The USB is a plug-and-play interface between the PC and the peripherals. The main advantage of USB is that the ...

Control Messages are short and manage the Message flow between Port Partners or for exchanging Messages that require no additional data. Data Messages exchange information between a pair of Port ...