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做了一块pci2050板子,接入9个secondary设备,怕有问题,只焊接了一个pci设备,其余8个设备没有焊接,在windows下的设备管理中能看到pci2050已经ok,但是看不到所连接的secondary设备,难道必须把9个seconday设备都焊上才可以吗?另外datasheet中没有说明没有接入的secondary设备的时钟线该怎么处理。