Intel® 500 Series Chipset Family On-Package PCH Datasheet Volume 1
Datasheet
ID | Date | Version | Classification |
---|---|---|---|
631119 | 21/09/2021 00:00:00 | Public Content |
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Power Management Sub-state
S0ix State Enable
If a platform wants to disable certain S0ix states, BIOS can do so by modifying the LPM_EN register. The mapping of S0ix states to bits in the LPM_EN register are given below:
Bit Number | S0ix State | Required Implementation1 |
---|---|---|
0 | S0i2.0 | None2 |
1 | S0i2.1 | None2 |
2 | S0i2.2 | EXT_PWR_GATE# controlled FET to gate internal power plane for the HSIO core and suspend logic. |
3 | S0i3.0 | None2 |
4 | S0i3.1 | None2 |
5 | S0i3.2 | None2 |
6 | S0i3.3 | EXT_PWR_GATE# controlled FET to gate internal power plane for the HSIO core and suspend logic. |
Base State | Sub-state | Internal Power Plane for Internal Units that not required during S0ix | Internal Power Plane for the HSIO Core and Suspend Logic | Internal Power Plane for Gated SRAMs and Integrated System Clock PLLs |
---|---|---|---|---|
S0i2.0 | S0i2.1 | OFF | ON | ON |
S0i2.2 | OFF | OFF | ON | |
S0i3.0 | S0i3.1 | OFF | ON | ON |
S0i3.2 | OFF | ON | ON | |
S0i3.3 | OFF | OFF | ON |