Intel® 400 Series Chipset On-Package Platform Controller Hub
Online Register Database
ID | Date | Version | Classification |
---|---|---|---|
615146 | 08/09/2019 | 1.2 | Public |
Active LTR (ACTIVELTR_VALUE) – Offset 210
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31 | 0h | RO | Non-Snoop Requirement (non_snoop_requirment) If the Requirement (bit 15) is clear, that indicates that the device has no LTR requirement for this type of traffic (i.e. it can wait for service indefinitely). If the 10-bit latency value is zero it indicates that the device cannot tolerate any delay and needs the best possible service/response time. |
30:29 | - | - | Reserved
|
28:26 | 0h | RO | Non-Snoop Latency Scale (non_snoop_latency_scale) Support for codes 010 (1us) or 011 (32us) for Snoop Latency Scale (1us -> 32ms total span) only. Writes to this CSR which dont match those values will be dropped completely, next read will return previous value. |
25:16 | 0h | RO | Non-Snoop Value (non_snoop_value) 10-bit latency value |
15 | 0h | RW | Snoop Requirement (snoop_requirment) If the Requirement (bit 15) is clear, that indicates that the device has no LTR requirement for this type of traffic (i.e. it can wait for service indefinitely). If the 10-bit latency value is zero it indicates that the device cannot tolerate any delay and needs the best possible service/response time. |
14:13 | - | - | Reserved
|
12:10 | 2h | RW | Snoop Latency Scale (i2c_sw_ltr_snoop_scale_reg_12_10) Support for codes 010 (1us) or 011 (32us) for Snoop Latency Scale(1us -> 32ms total span) only. Writes to this CSR which dont match those values will be dropped completely, next read will return previous value. |
9:0 | 0h | RW | Snoop Value (snoop_value) 10-bit latency value |