56 Intel® 41110 Serial to Parallel PCI Bridge Design Guide
Design Guide Checklist
Table 20. PCI/PCI-X Interface S ignals (Sheet 1 of 2)
Signals Recommendations R eason/Impact
A_AD[63:32]
A_CBE[7:4]#
A_DEVSEL#
A_FRAME#
A_IRDY#
A_TRDY#
A_STOP#
A_PERR#
A_SERR#
A_REQ[5:0]#
A_GNT[5:0]#
A_LOCK#
A_PAR
A_PAR64
A_ACK64#
A_REQ64#
No external pullup resistors required on system board.
41110 has internal pullup resistors
on these signals.
X_AD[31:0] and X_CBE#[3:0]
signals do not require pullups
according to the PCI Specification.
A_133EN
Only relevant when running in PCI-X Mode
(X_PCIXCAP = 1).
Determines the max PCI-X Mode 1 frequency for a
particular segment (100 MHz or 133 MHz):
0 = 100 MHz PCI-X max frequency
1 = 133 MHz PCI-X max frequency
Use an 8.2K pullup resistor to VCC33. This resistor is
located on the system board.
Sampled on the rising edge of
PERST#.
A_INTA#
A_INTB#
A_INTC#
A_INTD#
No pullup resistors required on these signals. The 41110 has internal pullup
resistors on these signals.