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. |