轻松驾驭嵌入式USB设计 —USB完全解决方案全新登场Silicon Labs

简介：Silicon Laboratories针对要达成完整的“从元器件到产品”目标所面临的这些挑战，将实行USB接口加以简化，以便让工程师能够专注在嵌入式系统的设计工作上，通过结合了广范围的具备USB功能的微控制器，以及合适的硬件与软件开发工具，搭配参考设计、应用注记与软件模板，Silicon Labs提供工程师在进行开发快速设计创新、高度整合产品时所需的一切。Silicon Labs提供的不仅是一个具有USB功能的微控制器，它们提供的是实行USB嵌入式解决方案的一个经过验证之路，欢迎广

问：USBxpress软件包是否支持uC/OS操作系统平台
答： USBXpress does include support for both the MCU and Windows operating systems.  It also includes support for the CP210x devices.  Linux and Mac OS are not supported.

问：我用C8051f340做仪器，USB连接PC，pc不弹出卸载仪器而带电插拔，经常插拔USB能不能损坏，用什么保护器件保护USB器件或USB总线能更可靠？
答： It is safe to plug and plug all of our MCUs.  We recommend ESD protection diodes, such as the Littefuse SP0503BAHT.  Other manufacturers also provide USB protection diodes.

问：我公司要设计一个马达控制器与PC的通讯接口产品，原先计划用RS232，如现在改为USB，你们能提供技术支持吗？如能，希望你们能联系我。
答： We have USB to UART converter CP210x. For more infomration, please contact Edom China.

问：USBXpress支持LINUX操作系统吗？
答： USBXpress only supports Windows 2K, XP, Server 2003, and Vista.  Linux is not supported.

问：Will you provide some training if we buy the Full development kits for Flash-based USB MCUs? Will it be free or not?
答： Sure, our local distributors will be more than happy to provide your the necessary support. Please contact them!

问：請問Silicon Lab的IDE為什麼模擬只設定四個斷點而已
答： This is a hardware limitation.  Since the debugging is performed real-time by the MCU, the hardware limitation allows for only 4 hardware breakpoints.

问：Silicon 提供的IC是否提供不同的PID? 用户是否可以更改PID? 如何实现?
答： Yes, we can provide different PID for the customer for free.  The modification can be done using the software in Application Note AN144 - CP210xSetIDs.  Please ask the customer to send a request to mcutools@silabs.com to request a free

问：請問Silicon Lab USB Device Power可直接接+5.0V供應嗎？
答： Yes!

问：si4701的datasheet哪里下载？只看到datasheet short.没有编程方面的说明.只有电气参数
答： Please contact Edom China for more information.

问：在USB的设计中，速度往往比较关键。请问在设计中如何考虑速度的设计？
答： The most important thing is keeping the USB ISRs optimized and also memory optimization.  Data should only be moved when necessary and sometime it is fine to directly process data from the USB FIFO.  Also, using the USB Bulk transfer mo