SNLA415 August   2022 DS160PT801

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2History
  5. 3Components of PCIe Communication
    1. 3.1 Root Complex
    2. 3.2 Repeater
    3. 3.3 Endpoints
  6. 4Signaling
    1. 4.1 PERST
    2. 4.2 WAKE and CLKREQ
    3. 4.3 REFCLK
  7. 5Link Training
    1. 5.1 Receiver Detect (Rx Detect)
    2. 5.2 Polling
    3. 5.3 Configuration
  8. 6Link Equalization
    1. 6.1 Phase 0 and 1
    2. 6.2 Phase 2 and 3
  9. 7Summary
  10. 8References

3 Components of PCIe Communication

PCIe communication consists of three main components: root complex, repeaters, and PCIe endpoints. PCIe communication is hierarchical so there is a single source, which is the root complex, through which all the data passes. The data goes to the root complex from multiple PCIe endpoints and vice versa. This hierachy is shown in Figure 3-1.

GUID-20220804-SS0I-TRMD-WV4S-LHXNK3QJPGDV-low.png Figure 3-1 PCIe Topology