Datasheet

TUSB7320, TUSB7340
SLLSE76E–MARCH 2011– REVISED JULY 2011 www.ti.com
6.2.2 Host Controller Interface Version Number
This read only register indicates the xHCI specification revision number supported by the TUSB73X0.
BAR0 register offset: 02h
Register type:Read-Only
Default value: 0096h
Table 6-4. HC Capability Register 02h
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
No.
Reset
0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 0
State
6.2.3 Host Controller Structural Parameters 1
This read only register defines basic structural parameters supported by the TUSB73X0.
BAR0 register offset: 04h
Register type:Read-Only
Default value: 0800 0840h
Table 6-5. HC Capability Register 04h
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
No.
Reset
0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0
State
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
No.
Reset
0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0
State
Table 6-6. HC Structural Parameters 1 Description
Bit Field Name Access Description
Number of Ports. For the TUSB7340, this field is 08h to indicate that 8
ports are supported. For the TUSB7320, this field is 04h to indicate that 4
31:24 MAX_PORTS r
ports are supported. This field also indicates the number of sets of port
registers that are addressable in the Operational Register Space.
23:19 RSVD r Reserved. Returns zeros when read.
Number of Interrupters. This field specifies the number of Interrupters
18:8 MAX_INTRS r that are implemented. The TUSB73x0 implements 8 Interrupters. Each
Interrupter is allocated to a vector of MSI-X.
Number of Device Slots. This field specifies the maximum number of
7:0 MAX_SLOTS r Device Context Structures and Doorbell Array entries that are supported.
The TUSB73x0 supports 64 Device Slots.
76 xHCI MEMORY MAPPED REGISTER SPACE Copyright © 2011, Texas Instruments Incorporated
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Product Folder Link(s): TUSB7320 TUSB7340