LFPS On Count (LFPSONCOUNT_REG) – Offset 81b8 - 001 - ID:834576 | Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2

Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2

ID	Date	Version	Classification
834576	10/10/2024	001	Public

LFPS On Count (LFPSONCOUNT_REG) – Offset 81b8

LFPS On Count

Bit Range	Default	Access	Field Name and Description
31:23	0h	RW	Rsvd (RSVD) Reserved
22	0h	RW	EN LFPS RX CONSOLIDATION (EN_LFPS_RX_CONSOLIDATION) When set, port will start comprehending LFPS on either of lane for the Resume Exits
21	0h	RW	RTC Clock Generation Override (RTCCLKGENOVERRIDE) when set it will Disable the RTC tick generation unconditionally.This will be used by software to disable the tick and CRO if WDE/WCE is disabled
20	0h	RO	Reserved
19	0h	RW	Rx LFPS Filter 8us Enable (RXLFPSFILT_8US_EN) 0- RXLFPS detection filter for U3 Exit is 4 ticks of 128ns 1- RXLFPS Filter will remain at 8us
18	1h	RW	Disable RTC Polling (XDISRTCPOLLING) 1: Disable the RTC tick generation which is consumed for the RxDet Polling, LFPS Polling and Aux Clock PCG Wakup to enable this. 0: RTC tick generation based on the defined interval
17:16	0h	RW	U2P3 LFPS Periodic Sampling Control (XU2P3LPSC) This field controls the OFF time for the LFPS periodic sampling for SS and SSIC ports in U2P3. If LFPSPM for a port is 1, it will override the OFF time and LFPS receiver will remain OFF permanently. For Fast Sim mode, 500us will be equivalent to 5us. 0x0 Polling Disable. (RXDET Polling will become 100ms.) 0x1 500us OFF Time 0x2 1ms OFF Time 0x3 1.5ms OFF Time
15:10	8h	RW	X LFPS On Count SSIC (XLFPSONCNTSSIC) This time would describe the number of clocks SSIC LFPS will remain ON. SSIC LFPS detection operation may be carried out on using RTC clock or Oscillator clock. The value of this register should be adjusted accordingly. For RTC recommended value is 2. For Oscillator clock, recommended value is 8.
9:0	c8h	RW	X LFPS On Count SS (XLFPSONCNTSS) This time would describe the number of clocks LFPS will remain ON. LFPS detection operation may be carried out on using RTC clock or Oscillator clock. The value of this register should be adjusted accordingly. For RTC recommended value is 2. For Oscillator clock, recommended value is 200.