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TUSB7340 Datasheet(PDF) 103 Page - Texas Instruments |
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TUSB7340 Datasheet(HTML) 103 Page - Texas Instruments |
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103 / 122 page  8.3.5 Host Controller Doorbell Registers The TUSB73X0 supports an array of 65 Doorbell Registers, one for the host controller plus one for each Device Slot supported. The address of the first Doorbell Register is the address programmed into the Base Address Register 0 plus the value programmed into the Doorbell Offset. Doorbell Base register offset: 00h + (04h × Device Slot), where Device Slot = 0 through 64 Register type: Read-Only, Read/Write Default value: 0000 0000h Table 8-178. HC Doorbell Register (Doorbell Base + (04h × Device Slot)), where Device Slot = 0 through 64 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 0 0 0 Bit No. 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Reset State 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Table 8-179. Interrupter Management Register Description BIT FIELD NAME ACCESS DESCRIPTION 31:16 DB_STREAM_ID rw Doorbell Stream ID. This field returns zeros when read. 15:8 RSVD r Reserved. Returns zeros when read. 7:0 DB_TARGET rw Doorbell Target. This field returns zeros when read. 8.3.6 xHCI Extended Capabilities Registers These registers are used for the xHCI Extended Capabilities in the TUSB73X0. The offset in Table 8-180 is from the xHCI Extended Capabilities Base, which is the address programmed into the Base Address Register 0 plus the value programmed into the xHCI Extended Capabilities Pointer field in the Host Controller Capability Parameters. Table 8-180. xHCI Extended Capabilities Register Map REGISTER NAME OFFSET Legacy Support Capability 00h-07h Reserved 08h-0Fh xHCI Supported Protocol Capability (USB 2.0) 10h-1Bh Reserved 1Ch-1Fh xHCI Supported Protocol Capability (USB 3.0) 20h-2Bh 8.3.6.1 USB Legacy Support Capability Register This register is used to coordinate the ownership of the host controller between BIOS and the operating system. xHCI Extended Capabilities Base register offset: 00h Register type: Read-Only, Read/Write Default value: 0000 0201h Table 8-181. xHCI Extended Capabilities Register (xHCI Extended Capabilities Base + 00h) Bit No. 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 www.ti.com TUSB7320, TUSB7340 SLLSE76Q – MARCH 2011 – REVISED MARCH 2024 Copyright © 2024 Texas Instruments Incorporated Submit Document Feedback 103 Product Folder Links: TUSB7320 TUSB7340 |
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