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XIO2001IPNP 数据表(PDF) 32 Page - Texas Instruments

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部件名 XIO2001IPNP
功能描述  PCI Express??to PCI Bus Translation Bridge
PDF  131 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

XIO2001IPNP 数据表(HTML) 32 Page - Texas Instruments

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XIO2001
SCPS212D – MAY 2009 – REVISED JANUARY 2010
www.ti.com
3.7
PCI Interrupt Conversion to PCI Express Messages
The bridge converts interrupts from the PCI bus sideband interrupt signals to PCI Express interrupt
messages.
Table 3-7, Figure 3-7, and Figure 3-8 illustrate the format for both the assert and deassert INTx
messages.
Table 3-7. Interrupt Mapping
In The Code Field
INTERRUPT
CODE FIELD
INTA
00
INTB
01
INTC
10
INTD
11
Figure 3-7. PCI Express ASSERT_INTX Message
Figure 3-8. 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 3-9 illustrates the format for a PCI Express PME message.
32
Feature/Protocol Descriptions
Copyright © 2009–2010, Texas Instruments Incorporated
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