Intel® 400 Series Chipset On-Package Platform Controller Hub
Online Register Database
ID | Date | Version | Classification |
---|---|---|---|
615146 | 08/09/2019 | 1.2 | Public |
Throttle Levels (TL) – Offset 40
Throttle Levels
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31 | 0b | RW/1L | TT.Lock (TTL) When set to 1, this entire register (TL) is locked and remains locked until the next platform reset. |
30 | 0b | RW/L | TT.State13 Enable (TT13EN) When set to 1, then PMSync state 13 will force at least T2 state. |
29 | 0b | RW/L | TT Enable (TTEN) When set the thermal throttling states are enabled. At reset, BIOS must set bits 28:0 and then do a separate write to set bit 29 to enable throttling. SW may set bit 31 at the same time it sets bit 29 if it wishes to lock the register. If SW wishes to change the values of 28:0, it must first clear the TTEN bit, then change the values in 28:0, and then re-enable TTEN. It is legal to set bits 31, 30 and 29 with the same write. |
28:20 | 000000000b | RW/L | T2 Level (T2L) When TTEN = 1 AND TSE = 1 AND (T2L = TSR[8:0] T1L), then the system is in T2 state. |
19 | - | - | Reserved
|
18:10 | 000000000b | RW/L | T1 Level (T1L) When TTEN = 1 AND TSE = 1 AND (T1L = TSR[8:0] T0L), then the system is in T1 state. |
9 | - | - | Reserved
|
8:0 | 000000000b | RW/L | T0 Level (T0L) When TEMP.TSR[8:0] is less than or equal to T0L OR TT.Enable is 0 OR TSE = 0, then the system is in T0 state. |