PCB Design Guide (PCI Express)

PCI Express PCB설계시 아래의 규칙을 준수하여 설계한다.

디퍼런셜 페어 임피던스는 90옴으로 관리

The PCIe interface supports the Polarity Inversion. This means the positive and negative signal pins 

can be inverted in order to simplify the layout by avoiding crossing of the signals. Some PCIe 

devices support additional Lane Reversal for multi-lane interfaces. Since the standard interfaces of 

Apalis provide only a single lane PCIe interface, the Lane Reversal feature is not supported in the 

Apalis specifications. Some Apalis modules provide additional multi-lane PCIe interface in the type-

specific area. For such modules, Lane Reversal is only applicable if the PCIe device is supporting it.