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XIO2000AI Datasheet(PDF) 49 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

Part # XIO2000AI
Description  PCI Express to PCI Bus Translation Bridge
PDF  159 Pages
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Manufacturer  TAOS [TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS]
Direct Link  http://www.taosinc.com
Logo TAOS - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

XIO2000AI Datasheet(HTML) 49 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

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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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