Intel® 400 Series Chipset On-Package Platform Controller Hub
Online Register Database
ID | Date | Version | Classification |
---|---|---|---|
615146 | 08/09/2019 | 1.2 | Public |
XECP_SUPP_USB2_2 (XECP_SUPP_USB2_2) – Offset 8008
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:28 | 3h | RO | Protocol Speed ID Count (PROT_SPD_ID_CNT) 3 USB 2.0 Speed (High, Full, Low) |
27:21 | - | - | Reserved
|
20 | 1b | RW/L | BESL LPM Capability (BLC) Bit is set to 1 to indicate that the the ports described by this xHCI Supported Protocol Capability will apply BESL timing to BESL and BESLD fields of the PORTPMSC and PORTHLPMCC registers. |
19 | 1b | RW/L | Protocol Defined - Hardware LMP Capability (HLC)
|
18 | 0b | RO | Protocol Defined - Integrated Hub Implementation (IHI)
|
17 | 0b | RO | Protocol Defined - High SPeed Only (HSO) This field indicates the number of Protocol Speed ID (PSI) Dwords that the xHCI Supported Protocol Capability data structure contains.If this field is non-zero, then all speeds supported by the protocol shall be defined using PSI Dwords, i.e. no implied Speed ID mappings apply. |
16 | - | - | Reserved
|
15:8 | 16d | RO | Compatible Port Count (CPC) This field identifies the number of consecutive Root Hub Ports (starting at the Compatible Port Offset) that support this protocol. Valid values are 1 to MaxPorts. |
7:0 | 1h | RO | Compatible Port Offset (CPO) This field specifies the starting Port Number of Root Hub Ports that support this protocol. Valid values are ‘1’ to MaxPorts. |