阅读:1606回复:2
当usb设备采用自供电时,如何处理pc机usb接口中的电源线?
我的usb采用的是自供电方式,请问如何处理pc机usb接口中的电源线,能将其悬空不管吗,还是其他什么处理,盼知!!
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沙发#
发布于:2005-02-03 15:27
我记得好象在USB设备的配置描述符中有相关项的处理!
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板凳#
发布于:2005-02-04 16:21
some people will use USB vcc (VBus) to connect the D12's EOT and mcu side by resistor(voltage divider). This method is use to inform the MCU that the D12 is connected to pc or not. Moreover this configuration can make the D12 not supporting voltage in D+ pin under removal condition.\
Detail information:http://www.zlgmcu.com/philips/usb/PDIUSBD12/PDIUSBD12faq.pdf ;) |
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