Design Guide Checklist

Table 20. PCI/PCI-X Interface Signals (Sheet 1 of 2)

Signals

Recommendations

Reason/Impact

 

 

 

A_AD[63:32]

 

 

A_CBE[7:4]#

 

 

A_DEVSEL#

 

 

A_FRAME#

 

 

A_IRDY#

 

 

A_TRDY#

 

41110 has internal pullup resistors

A_STOP#

 

 

on these signals.

A_PERR#

No external pullup resistors required on system board.

X_AD[31:0] and X_CBE#[3:0]

A_SERR#

 

signals do not require pullups

A_REQ[5:0]#

 

according to the PCI Specification.

 

 

A_GNT[5:0]#

 

 

A_LOCK#

 

 

A_PAR

 

 

A_PAR64

 

 

A_ACK64#

 

 

A_REQ64#

 

 

 

 

 

 

Only relevant when running in PCI-X Mode

 

 

(X_PCIXCAP = 1).

 

 

Determines the max PCI-X Mode 1 frequency for a

 

A_133EN

particular segment (100 MHz or 133 MHz):

Sampled on the rising edge of

0 = 100 MHz PCI-X max frequency

 

PERST#.

 

1 = 133 MHz PCI-X max frequency

 

 

 

Use an 8.2Kpullup resistor to VCC33. This resistor is

 

 

located on the system board.

 

 

 

 

A_INTA#

 

 

A_INTB#

No pullup resistors required on these signals.

The 41110 has internal pullup

A_INTC#

resistors on these signals.

 

A_INTD#

 

 

 

 

 

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Intel® 41110 Serial to Parallel PCI Bridge Design Guide

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Intel 41110 manual Design Guide Checklist, PCI/PCI-X Interface Signals Sheet 1