Datasheet
TUSB7320, TUSB7340
www.ti.com
SLLSE76E–MARCH 2011– REVISED JULY 2011
Table 6-61. xHCI Extended Capabilities Register (xHCI Extended Capabilities Base + 14h)
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
No.
Reset
0 0 1 0 0 0 0 0 0 1 0 0 0 0 1 0
State
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
No.
Reset
0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1
State
6.6.5 xHCI Supported Protocol Port Register (USB 2.0)
This register indicates how many USB 2.0 ports are supported and what their port numbers are.
xHCI Extended Capabilities Base register offset:18h
Register type:Read-Only
Default value: 0001 0X01h
Table 6-62. xHCI Extended Capabilities Register (xHCI Extended Capabilities Base + 18h)
Bit
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
No.
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
State
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
No.
Reset
0 0 0 0 0 x x 0 0 0 0 0 0 0 0 1
State
Table 6-63. xHCI Supported Protocol Capability Register (USB 2.0) Description
Bit Field Name Access Description
31:19 RSVD r Reserved. Returns zeros when read.
Integrated Hub Implemented. This field is ‘0’ to indicate that the root hub
18 IHI r to external port mapping adheres to the default mapping in the xHCI
Specification.
High-speed Only. This field is ‘0’ to indicate that the USB 2.0 ports are
17 HSO r
Low-, Full-, and High-speed capable.
L1 Capability. This field is ‘1’ to indicate that the TUSB73X0 supports the
16 L1C r
USB 2.0 Link Power Management L1 state.
Compatible Port Count. For the TUSB7340 , this field is 04h to indicate
15:8 COMPATIBLE_PORT_CNT r that four USB 2.0 ports are supported. For the TUSB7320, this field is
02h to indicate that two USB 2.0 ports are supported.
Compatible Port Offset. This field is 01h to indicate that the first USB 2.0
7:0 COMPATIBLE_PORT_OFF r
port is port 1.
6.6.6 xHCI Supported Protocol Capability Register (USB 3.0)
This register indicates that the Supported Protocol Capability is for USB 3.0.
xHCI Extended Capabilities Base register offset:20h
Register type:Read-Only
Default value: 0300 0002h
Copyright © 2011, Texas Instruments Incorporated xHCI MEMORY MAPPED REGISTER SPACE 95
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Product Folder Link(s): TUSB7320 TUSB7340