SLLSE76Q March 2011 – March 2024 TUSB7320 , TUSB7340
PRODUCTION DATA
The Link Capabilities Register indicates the link specific capabilities of the TUSB73X0.
PCI register offset: 7Ch
Register type: Read-only
Default value: 0007 xC12h
Bit No. | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
Reset State | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
Bit No. | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
Reset State | 0 | x | x | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
BIT | FIELD NAME | ACCESS | DESCRIPTION |
---|---|---|---|
31:24 | PORT_NUM | r | Port Number. This field indicates port number for the PCI Express link. This field is read only 00h indicating that the Link is associated with port zero. |
23:19 | RSVD | r | Reserved. Returns zeros when read. |
18 | CLK_PM | r | Clock Power Management. This bit is hardwired to 1 to indicate that the TUSB73X0 supports Clock Power Management through the CLKREQ# protocol. |
17:15 | L1_LATENCY | r | L1 Exit Latency. This field indicates the time that it takes to transition from the L1 state to the L0 state. The value reported by this field is determined by either the L1_EXIT_LAT_ASYNC field or the L1_EXIT_LAT_COMMON field in the General Control Register 0. |
14:12 | L0S_LATENCY | r | L0s Exit Latency. This field indicates the time that it takes to transition from the L0s state to the L0 state. The value reported by this field is determined by either the L0s_EXIT_LAT_ASYNC field or the L0s_EXIT_LAT_COMMON field in the General Control Register 0. |
11:10 | ASLPMS | r | Active State Link PM Support. This field indicates the level of active state power management that the TUSB73X0 supports. The value 11b indicates support for both L0s and L1 through active state power management. |
9:4 | MLW | r | Maximum Link Width. This field is encoded 000001b to indicate that the TUSB73X0 only supports a 1x PCI Express link. |
3:0 | MLS | r | Maximum Link Speed. This field is encoded 0010b to indicate that the TUSB73X0 supports link speeds of 5 Gb/s and 2.5 Gb/s. |