USB转换芯片

<p>The USB3320 is a highly integrated full featured Hi-Speed USB 2.0 transceiver based on Microchip's proven ULPI interface. The USB3320 provides an extremely flexible solution in a convenient 5 x 5 mm QFN package. It supports a wide variety of different reference clock frequencies with one single part, as well as accepting clocking from crystal/resonators and the ULPI 60Mhz Clock-In mode. As with previous generations of Microchip's USB transceivers, the USB3320 integrates a USB switch and both ESD and VBUS over-voltage protection devices.</p><p><br></p><p>Microchip's complimentary and confidential <a href="https://www.microchip.com/en-us/support/design-help/design-check-services" rel="noopener noreferrer" target="_blank" style="color: rgb(28, 53, 94);">MicroCHECK</a> design review service, which offers insight from the initial concept to the final PCB layout, is available to customers who are using our products in their projects. You can confidently submit your design materials in a secure and private setting, and our expert engineers will provide individualized feedback to enhance your design. MicroCHECK design review service is subject to Microchip's <a href="https://www.microchip.com/en-us/support/design-help/design-check-services/design-check-services-program-terms-and-conditions" rel="noopener noreferrer" target="_blank" style="color: rgb(28, 53, 94);">Program Terms and Conditions</a> and requires a myMicrochip account.</p>

CH340是一个USB总线的转接芯片，实现USB转串口或者USB转打印口。在串口方式下，CH340提供常用的MODEM联络信号，用于为计算机扩展异步串口，或者将普通的串口设备直接升级到USB总线。

USB2.0芯片，CH340是一个USB总线的转接芯片，实现USB转串口或者USB转打印口。在串口方式下，CH340提供常用的MODEM联络信号，用于为计算机扩展异步串口，或者将普通的串口设备直接升级到USB总线。