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3.10.9.8
Switch S8E1- 5
When this input is pulled high (off), the bridge changes the output impedance of the drivers to the
opposite state than was assumed by default, as shown in
3.10.9.8.1
Switch S8E1 - 5: Descriptions
Switch
S8E1-5
Table 53.
Switch S8E1 - 5: Settings and Operation Mode
S8E1-5
Off
On
Table 54.
Switch S8E1 - 5: Driver Mode Output Impedances
Secondary Bus Mode
Conventional PCI
3.10.9.9
Switch S8E1- 6
When this input is pulled high (off), the bridge changes the output impedance of the drivers to the
opposite state than was assumed by default, as shown in
Table 55.
Switch S8E1 - 6: Descriptions
Switch
S8E1-6
Table 56.
Switch S8E1 - 6: Settings and Operation Mode
S8E1-6
Off
On
Table 57.
Switch S8E1 - 6: Driver Mode Output Impedances
Primary Bus Mode
Conventional PCI
Board Manual
Intel® IQ80219 General Purpose PCI Processor Evaluation Platform
Association
S_DRVR_MODE: Driver impedance selection for
PCI-X Bridge
SPCI-X bus.
PCI 66, PCI-X 66/100: 40
PCI-X 133: 20
impedance.
PCI 66, PCI-X 66/100: 20
PCI-X 133: 40
impedance.
PCI-X 66
PCI-X 100
PCI-X 133
Association
P_DRVR_MODE: Driver impedance selection for
PCI-X Bridge
PPCI-X bus.
PCI 66, PCI-X 66/100: 20
PCI-X 133: 40
impedance.
PCI 66, PCI-X 66/100: 40
PCI-X 133: 20
impedance.
PCI-X 66
PCI-X 100
PCI-X 133
Table 54
Description
Operation Mode
impedance.
impedance.
Default Driver Mode
(S_DRVR_MODE=0, On)
Multi-point (20 )
Multi-point (20 )
Multi-point (20
)
Point-to-point (40
)
Table 57
Description
Operation Mode
impedance.
impedance.
Default Driver Mode
(P_DRVR_MODE=0, On)
Multi-point (20 )
Multi-point (20 )
Multi-point (20
)
Point-to-point (40
)
Hardware Reference Section
below:
Factory Default
On
Driver Mode when
(S_DRVR_MODE=1, Off)
Point-to-point (40
Point-to-point (40
Point-to-point (40
Multi-point (20
)
below:
Factory Default
Off
Driver Mode when
(P_DRVR_MODE=1, Off)
Point-to-point (40
Point-to-point (40
Point-to-point (40
Multi-point (20
)
)
)
)
)
)
)
61
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