Intel® 400 Series Chipset On-Package Platform Controller Hub
Online Register Database
| ID | Date | Version | Classification |
|---|---|---|---|
| 615146 | 08/09/2019 | 1.2 | Public |
VR Miscellaneous Control (VR_MISC_CTL) – Offset 1900
This register allows software to program various VR modes for the PCH. This register is in the PRIMARY power well and is reset by RSMRST# assertion.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 30:20 | - | - | Reserved
|
| 19:18 | 0b | RO/V | VCC_PRIM_0P85 Low Voltage Mode (VCC_PRIM_0P85_LVMT) This bit indicates the the VCC_PRIM_0P85 Low Voltage Mode: |
| 17 | - | - | Reserved
|
| 16 | 0b | RO/V | VCC_PRIM_1P0 Low Voltage Mode Disable (VCC_PRIM_1P0_LVMDIS) This bit indicates the VCC_PRIM_1P0 Low Voltage Mode Disable: |
| 15:13 | - | - | Reserved
|
| 12 | 1b | RO/V | CORE VR Allowed (CORE_VR_ALLOWED) This field reports the Separate Core VR support. |
| 11:10 | - | - | Reserved
|
| 9:8 | 0b | RO/V | CORE Voltage ID (CORE_VID) This field reports the core voltage ID. |
| 7:4 | - | - | Reserved
|
| 3 | 0b | RW | VID status override enable (VIDSOVEN) When set to 1 the bits in Primary VID Status Override (VIDSOV) are valid. |
| 2:0 | 0b | RW | Primary VID status override (VIDSOV) SW can program this register to reflect the actual voltage of the core power rail, VCCPRIM_CORE, if the system is not using the PCH VID control mechanism, CORE_VID1 and CORE_VID0. The accurate voltage is required for PCH power reporting. |