Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2
ID | Date | Version | Classification |
---|---|---|---|
834576 | 10/10/2024 | 001 | Public |
Power Control Enable (PCE) – Offset d2
This register controls the power gating of the IP.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
7:6 | 0h | RO | Reserved (RSVD0) This is a Reserved Register |
5 | 1h | RW | Hardware Autonomous Enable (HAE) If set, then the IP may request a PG whenever it is idle.NOTE: If this bit is set, then bits[2:0] must be 000. |
4 | 0h | RO | Reserved (RSVD1) This is a Reserved Register |
3 | 1h | RW/L | Sleep Enable (SE) If clear, then IP will never asset Sleep to the retention flops. If set, then IP may assert Sleep during PGing.Locked when DFx security policy is not in red unlock state. |
2 | 0h | RW | D3-Hot Enable (D3HE) If set, then IP will PG when idle and the PCS.PS register in the IP =11. |
1 | 0h | RW | I3 Enable (I3E) If set, then IP will PG when idle and the D0i3 register (D0I3C.I3 = 1) is set.NOTE: If bits [2:1] = 11, then the IP would PG whenever either the D3 register or the D0i3 register is set. |
0 | 0h | RW | PMC Request Enable (PMCRE) If set, then IP will PG when idle and the PMC requests power gating by asserting the pmc_ip_sw_pg_req_b signal. |