Intel® Core™ Ultra 200S and 200HX Series Processors
Datasheet, Volume 1 of 2
| ID | Date | Version | Classification |
|---|---|---|---|
| 832586 | 12/02/2025 | Public |
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PCI Express* Receiver Lane Polarity Inversion
The PCI Express* Base Specification requires polarity inversion to be supported independently by all receivers across a Link where each differential pair within each Lane of a PCIe* Link handles its own polarity inversion. Polarity inversion is applied, as needed, during the initial training sequence of a Lane. In other words, a Lane will still function correctly even if a positive (Tx+) signal from a transmitter is connected to the negative (Rx-) signal of the receiver. Polarity inversion eliminates the need to untangle a trace route to reverse a signal polarity difference within a differential pair and no special configuration settings are necessary in the PCIe* Controllers to enable it.