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TUSB7340 Datasheet(PDF) 41 Page - Texas Instruments |
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TUSB7340 Datasheet(HTML) 41 Page - Texas Instruments |
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41 / 117 page  TUSB7320, TUSB7340 www.ti.com SLLSE76M – MARCH 2011 – REVISED JULY 2015 7.5.1.41 Device Status Register The Device Status Register controls PCI Express device specific parameters. PCI register offset: 7Ah Register type: Read Only, Clear by a Write of One, Hardware Update Default value: 00x0h Table 61. PCI Register 7Ah 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 x 0 0 0 0 State Table 62. Device Status Register Description BIT FIELD NAME ACCESS DESCRIPTION 15:6 RSVD r Reserved. Return zeros when read. 5 PEND ru Transaction Pending. AUX Power Detected. This bit indicates that AUX power is present. 0 – No AUX power detected. (AUX_DET pin is 0) 4 APD ru 1 – AUX power detected. (AUX_DET pin is 1) This bit is set based upon the state of the AUX_DET pin. 3 URD rcu Unsupported Request Detected. 2 FED rcu Fatal Error Detected. 1 NFED rcu Non-Fatal Error Detected. 0 CED rcu Correctable Error Detected. 7.5.1.42 Link Capabilities Register The Link Capabilities Register indicates the link specific capabilities of the TUSB73X0. PCI register offset: 7Ch Register type: Read-only Default value: 0007 xC12h Table 63. PCI Register 7Ch 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 1 1 1 State Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 No. Reset 0 x x 1 1 1 0 0 0 0 0 1 0 0 1 0 State Table 64. Link Capabilities Register Description BIT FIELD NAME ACCESS DESCRIPTION Port Number. This field indicates port number for the PCI Express link. 31:24 PORT_NUM r This field is read only 00h indicating that the Link is associated with port zero. 23:19 RSVD r Reserved. Returns zeros when read. Clock Power Management. This bit is hardwired to 1 to indicate that the 18 CLK_PM r TUSB73X0 supports Clock Power Management through the CLKREQ# protocol. Copyright © 2011–2015, Texas Instruments Incorporated Submit Documentation Feedback 41 Product Folder Links: TUSB7320 TUSB7340 |
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