XIO2001 datasheet(37/131 Pages) TI

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XIO2001 PCI Express™ to PCI Bus Translation Bridge

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SCPS212B – MAY 2009 – REVISED JULY 2009

Table 3-6. Type 0 Configuration Transaction

IDSEL Mapping

DEVICE

AD[31:16]

NUMBER

00000

0000 0000 0000 0001

00001

0000 0000 0000 0010

00010

0000 0000 0000 0100

00011

0000 0000 0000 1000

00100

0000 0000 0001 0000

00101

0000 0000 0010 0000

00110

0000 0000 0100 0000

00111

0000 0000 1000 0000

01000

0000 0001 0000 0000

01001

0000 0010 0000 0000

01010

0000 0100 0000 0000

01011

0000 1000 0000 0000

01100

0001 0000 0000 0000

01101

0010 0000 0000 0000

01110

0100 0000 0000 0000

01111

1000 0000 0000 0000

1xxxx

0000 0000 0000 0000

Type 1 configuration registers transactions that target a downstream bus other then the secondary bus are

output on the PCI bus as type 1 PCI configuration transactions. Figure 3-6 shows the address phase of a

type 1 configuration transaction on the PCI bus as defined by the PCI specification.

Figure 3-6. Type 1 Configuration Transaction Address Phase Encoding

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