Intel 600 Series Chipset Family PCH Datasheet, Volume 1 of 2

Datasheet

ID 648364
Date 28/10/2021 00:00:00
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Multiple OOB Master

PCHs typically have multiple embedded processors (Intel ®CSME, PMC, ISH, etc.). From an eSPI perspective, these are all classified as Out-of-Band (OOB) processors (as distinct from the Host processor). Since any of these OOB processors may need to communicate with the embedded controller on the platform (example, EC. BMC), the eSPI controller implements dedicated OOB channel for each OOB processors including PMC and Intel ®CSME to improve the interface performance and potentially enable new usage models.