Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2
ID | Date | Version | Classification |
---|---|---|---|
834576 | 10/10/2024 | 001 | Public |
Backed Up Control (BUC) – Offset 3414
All bits in this register are in the RTC well and only cleared by RTCRST#.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:8 | 0h | RO | Reserved (RSVD_BUC_4) Reserved |
7 | 0h | RO | Reserved (RSVD_BUC_3) Reserved |
6:5 | 0h | RW | Reserved (RSVD_BUC_2) Reserved |
4 | 0h | RW | Daylight Savings Override (SDO) When this bit is a '1', the DSE bit in the RTC Register B bit(0) is a RW bit but has no effect where |
3:2 | 0h | RW | Reserved (RSVD_BUC_1) Reserved |
1 | 0h | RO | Reserved (RSVD_BUC_0) Reserved |
0 | 0h | RW/L | Top Swap (TS) This should be set by BIOS when the corresponding TS bit in the eSPI controller is set in order to properly restore the state of that field after reset since they are not preserved in an RTC well bit in those devices. |