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TUSB7340 Datasheet(PDF) 87 Page - Texas Instruments |
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TUSB7340 Datasheet(HTML) 87 Page - Texas Instruments |
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87 / 117 page  TUSB7320, TUSB7340 www.ti.com SLLSE76M – MARCH 2011 – REVISED JULY 2015 7.5.3.5 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 182. HC Doorbell Register (Doorbell Base + (04h × Device Slot)), where Device Slot = 0 through 64 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 183. 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. 7.5.3.6 xHCI Extended Capabilities Registers These registers are used for the xHCI Extended Capabilities in the TUSB73X0. The offset in Table 184 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 184. 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 7.5.3.6.1 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 185. 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 Copyright © 2011–2015, Texas Instruments Incorporated Submit Documentation Feedback 87 Product Folder Links: TUSB7320 TUSB7340 |
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