networking/pse-pd/pse-pi.rst

3 PSE Power Interface (PSE PI) Documentation
6 The Power Sourcing Equipment Power Interface (PSE PI) plays a pivotal role in
16 The IEEE 802.3 standard provides detailed documentation on the PSE PI.
19 - Section "33.2.3 PI pin assignments" covers the pin assignments for PoE
21 - Section "145.2.4 PSE PI" addresses the configuration for PoE systems that
24 PSE PI and Single Pair Ethernet
29 transmission. Unlike the configurations detailed in the PSE PI for standard
33 assignments for power delivery, as described in the PSE PI for multi-pair
36 Understanding PSE PI
39 The Power Sourcing Equipment Power Interface (PSE PI) is a framework defining
94 PSE PI compatibilities
121 PSE Power Interface (PSE PI) Connection Diagram
125 port, the Ethernet PHY (Physical Layer), and the PSE PI (Power Sourcing
129 the Ethernet PHY for data transmission and the PSE PI for power delivery.
143        |  |  |  o--|--|--|--|-------------------+  PSE PI     |
154 Simple PSE PI Configuration for Alternative A
157 The diagram below illustrates a straightforward PSE PI (Power Sourcing
167          |    PSE PI   |
186   More advanced PSE PI configurations may include integrated or external
190 More complex PSE PI configurations may include additional components, to support
197          |    PSE PI   |
210 Device Tree Configuration: Describing PSE PI Configurations
213 The necessity for a separate PSE PI node in the device tree is influenced by
215 descriptions of both simple and complex PSE PI configurations to illustrate
218 **Simple PSE PI Configuration:**
219 In a straightforward scenario, the PSE PI setup involves a direct, one-to-one
223 configurations, detailing the PSE PI within the existing PSE controller's node
228 **Complex PSE PI Configuration:**
229 Contrastingly, a complex PSE PI setup may encompass multiple PSE controllers or
234 these instances, a dedicated PSE PI node becomes essential for accurately
242 For simple PSE setups, including PSE PI information in the PSE controller node
245 benefit from a dedicated PSE PI node. This method adheres to IEEE 802.3
249 PSE PI Node: Essential Information
252 The PSE PI (Power Sourcing Equipment Power Interface) node in a device tree can
291      PI design rather than the controller alone. Multiple PSE cells per PI