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TUSB7320 Datasheet(PDF) 92 Page - Texas Instruments |
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TUSB7320 Datasheet(HTML) 92 Page - Texas Instruments |
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92 / 115 page ![]() TUSB7320, TUSB7340 SLLSE76J – MARCH 2011 – REVISED MAY 2012 www.ti.com Table 6-55. xHCI Extended Capabilities Register (xHCI Extended Capabilities Base + 00h) 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 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 0 1 0 0 0 0 0 0 0 0 0 1 State Table 6-56. USB Legacy Support Capability Register Description Bit Field Name Access Description 31:25 RSVD r Reserved. Returns zeros when read. 24 HC_OS_SEMA rw HC OS Owned Semaphore. 23:17 RSVD r Reserved. Returns zeros when read. 16 HC_BIOS_SEMA rw HC BIOS Owned Semaphore. Next Capability Pointer. This field is 04h, indicating that the xHCI 15:8 NEXT_CAP r Supported Protocol Capability for USB 2.0 starts at offset 10h from the xHCI Extended Capabilities Base. Capability ID. This field is 01h, identifying this capability as a USB 7:0 CAPABILITY_ID r Legacy Support Capability. 6.6.2 USB Legacy Support Control/Status Register This register is used by BIOS software to enable System Management Interrupts. xHCI Extended Capabilities Base register offset:04h Register type:Read-Only, Read/Clear Default value: 0000 0000h Table 6-57. xHCI Extended Capabilities Register (xHCI Extended Capabilities Base + 04h) 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 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 0 0 0 0 0 0 0 0 0 0 0 0 State Table 6-58. USB Legacy Support Control/Status Register Description Bit Field Name Access Description 31 SMI_BAR rc SMI on BAR. 30 SMI_PCI_COM rc SMI on PCI Command. 29 SMI_OS_CHANGE rc SMI on OS Ownership Change. 28:21 RSVD r Reserved. Returns zeros when read. 20 SMI_HOST_SYS_ERR r SMI on Host System Error. 19:17 RSVD r Reserved. Returns zeros when read. 16 SMI_EVENT_INT r SMI on Event Interrupt. 15 SMI_BAR_EN rw SMI on BAR Enable. 14 SMI_PCI_COM_EN rw SMI on PCI Command Enable. 92 xHCI MEMORY MAPPED REGISTER SPACE Copyright © 2011–2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TUSB7320 TUSB7340 |
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