Jasper Lake EDS Vol1
Datasheet
| ID | Date | Version | Classification |
|---|---|---|---|
| 633935 | 01/01/2021 | Public Content |
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TCO Modes
TCO Compatible Mode
In TCO Legacy/Compatible mode, only the host SMBus is used. The TCO Slave is connected to the host SMBus internally by default.
TCO Compatible Mode SMBus Configuration
In TCO Legacy/Compatible mode the PCH can function directly with an external LAN controller or equivalent external LAN controller to report messages to a network management console without the aid of the system processor. This is crucial in cases where the processor is malfunctioning or cannot function due to being in a low-power state. Below table includes a list of events that will report messages to the network management console.
| Event | Assertion? | Deassertion? | Comments |
|---|---|---|---|
| Watchdog Timer Expired | Yes | NA | “Hung S0” state entered |
| SMBALERT# pin | Yes | Yes | Must be in “Hung S0” state |
| BATLOW# | Yes | Yes | Must be in “Hung S0” state |
| CPU_PWR_FLR | Yes | No | “Hung S0” state entered |
Advanced TCO Mode
The PCH supports the Advanced TCO mode in which SMLink are used in addition to the host SMBus.
In advanced TCO mode, the TCO slave can either be connected to the host SMBus or the SMLink0.