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XIO2001IPNP Datasheet(PDF) 64 Page - Texas Instruments |
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XIO2001IPNP Datasheet(HTML) 64 Page - Texas Instruments |
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64 / 145 page ![]() RESET STATE 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 BIT NUMBER 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 8-32. MSI Message Lower Address Register Description BIT FIELD NAME ACCESS DESCRIPTION 31:2 ADDRESS RW System specified message address 1:0 RSVD R Reserved. Returns 00b when read. 8.4.45 MSI Message Upper Address Register This register contains the upper 32 bits of the address that a MSI message writes to when a serial IRQ is detected. If this register contains 0000 0000h, then 32-bit addressing is used; otherwise, 64-bit addressing is used. PCI register offset: 58h Register type: Read/Write Default value: 0000 0000h BIT NUMBER 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 NUMBER 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 8.4.46 MSI Message Data Register This register contains the data that software programmed the bridge to send when it send a MSI message. See Table 8-33 for a complete description of the register contents. PCI register offset: 5Ch Register type: Read/Write Default value: 0000h BIT NUMBER 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 8-33. MSI Message Data Register Description BIT FIELD NAME ACCESS DESCRIPTION 15:4 MSG RW System specific message. This field contains the portion of the message that the bridge forwards unmodified. 3:0 MSG_NUM RW Message number. This portion of the message field may be modified to contain the message number is multiple messages are enable. The number of bits that are modifiable depends on the number of messages enabled in the message control register. 1 message = No message data bits can be modified (default) 2 messages = Bit 0 can be modified 4 messages = Bits 1:0 can be modified 8 messages = Bits 2:0 can be modified 16 messages = Bits 3:0 can be modified XIO2001 SCPS212J – MAY 2009 – REVISED JANUARY 2021 www.ti.com 64 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: XIO2001 |
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