Intel® 400 Series Chipset On-Package Platform Controller Hub
Online Register Database
Power Scheduler Control-0 (PWR_SCHED_CTRL0) – Offset 8140
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:24 | 0ah | RW | Engine Idle Hysteresis (EIH) This register controls the min. idle span that has to be observed from the engine idle indicators before the power state flags (xhc_*_idle) will indicate a 1. |
23:12 | 019h | RW | Backbone PLL Shutdown Advance Wake (BPSAW) This register controls the time before the next scheduled transaction where the Backbone PLL request will assert. |
11:0 | 132h | RW | Backbone PLL Shutdown Min. Idle Duration (BPSMID) The sum of this register plus the Backbone PLL Shutdown Advance Wake form to a Total Idle time. When the next scheduled periodic transaction is after present time + Total Idle, the Backbone PLL request will de-assert, allowing the PLL to shutdwon. Register Format: |