Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2
ID | Date | Version | Classification |
---|---|---|---|
834576 | 10/10/2024 | 001 | Public |
S4 Power Gating Policies (S4_PWRGATE_POL) – Offset 182c
This register contains policy bits to configure various power gating options while the system is in S4. Note that setting any of these policies to "enabled" may not directly result in power gating - in some cases other HW qualifications may be dynamically applied.
This register is in the RTC power well and is reset by RTCRST#.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:2 | 0h | RO | Reserved |
1 | 0h | RW | S4 Power Gate Enable in DC Mode: SUS Well (S4DC_GATE_SUS) A '1' in this bit enables power gating of the SUS well in S4 while operating on DC power (based on the AC_PRESENT pin value). |
0 | 0h | RW | S4 Power Gate Enable in AC Mode: SUS Well (S4AC_GATE_SUS) A '1' in this bit enables power gating of the SUS well in S4 while operating on AC power (based on the AC_PRESENT pin value). |