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XIO2000AI 数据表(PDF) 49 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS |
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XIO2000AI 数据表(HTML) 49 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS |
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49 / 159 page ![]() Feature/Protocol Descriptions 39 April 2007 Revised October 2008 SCPS155C Table 3−12. Interrupt Mapping In The Code Field INTERRUPT CODE FIELD INTA 00 INTB 01 INTC 10 INTD 11 +0 +1 +2 +3 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Byte 0> R Fmt Type R TC Reserved T E Attr R Length Byte 0> R 0 1 1 0 1 0 0 R 0 0 0 Reserved D P 0 0 R 0 0 0 0 0 0 0 0 0 0 Byte 4> Requester ID Tag Code Byte 4> Requester ID Tag 0 0 1 0 0 0 x x Byte 8> Reserved Byte 12> Reserved Figure 3−8. PCI Express ASSERT_INTX Message +0 +1 +2 +3 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Byte 0> R Fmt Type R TC Reserved T E Attr R Length Byte 0> R 0 1 1 0 1 0 0 R 0 0 0 Reserved D P 0 0 R 0 0 0 0 0 0 0 0 0 0 Byte 4> Requester ID Tag Code Byte 4> Requester ID Tag 0 0 1 0 0 1 x x Byte 8> Reserved Byte 12> Reserved Figure 3−9. PCI Express DEASSERT_INTX Message 3.8 PME Conversion to PCI Express Messages When the PCI bus PME input transitions low, the bridge generates and sends a PCI Express PME message upstream. The requester ID portion of the PME message uses the stored value in the secondary bus number register as the bus number, 0 as the device number, and 0 as the function number. The Tag field for each PME message is 00h. A PME message is sent periodically until the PME signal transitions high. Figure 3−10 illustrates the format for a PCI Express PME message. +0 +1 +2 +3 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Byte 0> R Fmt Type R TC Reserved T E Attr R Length Byte 0> R 0 1 1 0 0 0 0 R 0 0 0 Reserved D P 0 0 R 0 0 0 0 0 0 0 0 0 0 Byte 4> Requester ID Tag Code Byte 4> Requester ID Tag 0 0 0 1 1 0 0 0 Byte 8> Reserved Byte 12> Reserved Figure 3−10. PCI Express PME Message |
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