Power Scheduler Control-0 (PWR_SCHED_CTRL0) – Offset 8140 - 1.3 - ID:767625 | 12th Generation Intel® Core™ Processors Datasheet Volume 2 of 2

Introduction
Processor Configuration Register Definitions and Address Ranges
D0:F0 Host Bridge and DRAM Controller - DMIBAR Registers (part 1)
D0:F0 Host Bridge and DRAM Controller - DMIBAR Registers (part 2)
- DMI VCm Resource Control (DMIVCMRCTL_0_0_0_DMIBAR)
D0:F0 Host Bridge and DRAM Controller - GFXVTBAR Registers
D0:F0 Host Bridge and DRAM Controller - GTTMMADR Registers (part 1)
D0:F0 Host Bridge and DRAM Controller - GTTMMADR Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - Host Bridge/DRAM Registers (part 1)
D0:F0 Host Bridge and DRAM Controller - Host Bridge/DRAM Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Host Controller Registers (part 1)
- GFX VT Range Base Address Register (GFXVTBAR_0_0_0_MCHBAR_NCU)
- VT DMI PEG VC0 Range Base Address Register (VTDPVC0BAR_0_0_0_MCHBAR_NCU)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Host Controller Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Memory Controller Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Memory Controller Registers (part 3)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Memory Controller Registers (part 4)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Memory Controller Registers (part 5)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Power Management Registers (part 1)
D0:F0 Host Bridge and DRAM Controller - MCHBAR Power Management Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - PXPEPBAR PCI Express Egress Port Registers
- Egress Port Virtual Channel Control (EPPVCCTL_0_0_0_PXPEPBAR)
- Egress Port Element Declaration Capability (EPESD_0_0_0_PXPEPBAR)
D0:F0 Host Bridge and DRAM Controller - REGBAR Registers (part 1)
D0:F0 Host Bridge and DRAM Controller - REGBAR Registers (part 2)
D0:F0 Host Bridge and DRAM Controller - VTDPVC0BAR Registers
D1:F0-1 PCI Express* Controller Registers
D10:F0 Platform Monitoring Technology (PMT) Registers
D13:F0 USB Host Controller (xHCI) Registers
D13:F0 USB Host Controller MBAR Registers
D13:F1 USB Device Controller (xDCI) Configuration Registers
D13:F2-3 Thunderbolt DMA Device Registers
D14:F0 Volume Management Device
D14:F0 Volume Management Device MEMBAR2 Registers
D2:F0 Processor Graphics
D4:F0 Dynamic Tuning Technology Registers
D5:F0 Image Processing Unit Registers
D6:F0 PCI Express* Controller Registers (part 1)
D6:F0 PCI Express* Controller Registers (part 2)
- Feature Control 2 (FCTL2)
D7:F0-3 Thunderbolt PCI Express* Controller Registers
D8:F0 Gauss Newton Algorithm Registers

Power Scheduler Control-0 (PWR_SCHED_CTRL0) – Offset 8140

Power Scheduler Control-0

Bit Range	Default	Access	Field Name and Description
31:24	0xA	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	0x19	RW	Backbone PLL Shutdown Advance Wake (BPSAW) This register controls the time before the next scheduled transaction where the Backbone PLL request will assert. Register Format: Bits [11:7] # of 125us uframes Bits [6:0] # of microseconds (0-124)
11:0	0x132	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: Bits [11:7] # of 125us uframes Bits [6:0] # of microseconds (0-124)

Bit Range

Default

Access

Field Name and Description

31:24

0xA

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

0x19

Backbone PLL Shutdown Advance Wake (BPSAW)

This register controls the time before the next scheduled transaction where the Backbone PLL request will assert.
Register Format:
Bits [11:7] # of 125us uframes
Bits [6:0] # of microseconds (0-124)

11:0

0x132

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:
Bits [11:7] # of 125us uframes
Bits [6:0] # of microseconds (0-124)

Power Scheduler Control-1 (PWR_SCHED_CTRL2)

USB2 Port Link Control 4 (USB2_LINK_MGR_CTRL_REG4) Power Scheduler Control-1 (PWR_SCHED_CTRL2)