usb原理图可以进行usb仿真应该是很好用的-usb diagram usb simulation can be used well 下载
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USB-BLASTER原理图，用于Altera可编程芯片的下载-USB-BLASTER schematics, Altera programmable chips for download 下载
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usb很好用的原理图-usb good use of schematics 下载
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采用Cypress EZ-USB设计原理图- 下载
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多款USB芯片原理图（ISP1161、ISP1362、ISP1581和D12）-several types of USB chip diagram (ISP1161 and ISP1362. ISP 1581 and D12) 下载
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USB转RS232原理图，很详细，值得收藏，本人自己总结的。, 下载
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自制USB键盘,含源码,原理图 用了一个4*4的小键盘,有0-9十个数字键, Num Lock键,Caps Lock键,Shift键,Ctrl键,Alt键,回车键等。 最多可以有三个键同时按下，如果相交的话，最多只能两个键按下-homemade USB keyboard, with the source code, and using the principle of a 4 * 4 small keyboard, a 0 -9 10 numeric keys, Num Lock key, Caps Lock key, Shift key, Ctrl key and Alt key, the Enter key, and so on. Up to be three keys are pressed together, if the intersection, the most pressing only two keys 下载
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ICD2原理图（protel格式、带usb接口和串口）-ICD2 diagram (Protel format, with usb interface, and a serial port) 下载
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USB2.0数据采集板原理图,用的是isp1581-USB data acquisition board schematics, using the isp1581 下载
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altera USB blaste 制作全套资料。包括原理图、93LC46的配置文件和CPLD的VHDL源程序。-altera USB blaste produced full set of information. Including drawings, 93LC46 configuration files and CPLD VHDL source. 下载
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