如何在Cy8ckit-030上使用VBUS ISR

大家好：
我开发的cy8ckit-030 开发板PSoC3的装置。我计划使用USBUART组件与它串联时插入到计算机进行沟通。这将是一个自供电设备，因此它可以***入到主机虽然已经运行。我想有一个中断服务程序时运行一个上升沿上的微型USB端口的VBUS / VCC引脚检测（连接到数字输入引脚拉低），然后开始USBUART成分，列举在主机和转移我的数据。
我的问题是，根据开发板的用户指南，USB连接器的VCC引脚连接到9V电池输入，12V AC适配器输入。示意图显示的VBUS连接销在PSoC3的，当我用一个电压探针上销，它读取5V如果我的适配器插入。
我如何开发和测试一个基于此开发板的VBUS ISR时所有 电源输入是捆绑在一起的吗？
谢谢你的帮助。



以下为原文
Hello All:
I'm developing a PSoC3 device on the CY8CKIT-030 development board. I plan on using the USBUART component to communicate with it serially when plugged into a computer. It will be a self-powered device, so it may be plugged into the host computer while already running. I would like to have an interrupt service rou tine run when a rising edge is detected on the VBUS/VCC pin of the mini USB port (connected to a pulled-down digital input pin), which will then start the USBUART component, enumerate on the host, and transfer my data.
The issue I'm having is that according to the development board user guide, the USB connector's VCC pin is tied to both the 9V battery input and the 12V AC adaptor input. The schematic shows VBUS connected to Pin 9 on the PSoC3, and when I use a voltage probe on that pin, it reads 5V if my adaptor is plugged in.
How can I develop and test a VBUS-based ISR on this development board when all the power inputs are tied together?
Thanks in advance for your help.