Signal Description
Table 2-15. Intel® 6702PXH 64-bit PCI Hub Signals and Default States (Sheet 3 of 3)
Signal
Power Plane
Type
During Reset
Immediately After Reset
PAPME#
3.3V
3.3V/1.5V
3.3V
I
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
High-Z
Undefined
Pulled High
Pulled High
Pulled High
Pulled High
Pulled High
Pulled High
Pulled High
Pulled High
Pulled High
Pulled Low
Pulled High
High-Z
PAREQ_[5]#
PAREQ_[4]#
PAREQ_[3]#
PAREQ_[2]#
PAREQ_[1]#
PAREQ_[0]#
PAREQ64#
PASERR#
PASTOP#
PASTRAP0
PATRDY#
SCLK
I/O
I
3.3V
I
3.3V
I
3.3V
I
3.3V
I
3.3V/1.5V
3.3V
I/O
I
3.3V
I/O
3.3V
I
3.3V
I/O
3.3V
I
SDTA
3.3V
I/O
High-Z
SMBUS[5]
SMBUS[3]
SMBUS[2]
SMBUS[1]
3.3V
I
I
I
I
Undefined
Undefined
Undefined
Undefined
3.3V
3.3V
3.3V
2.12
PCI/PCI-X Interface
2.12.1
Initialization
The Intel® 6702PXH 64-bit PCI Hub is the source bridge for the PCI bus. The Intel® 6702PXH
64-bit PCI Hub senses the PAM66EN, PA133EN, and the PAPCIXCAP pins to decide the mode
and frequency of operation (when not in hot plug mode or when in one-slot-no-glue hot plug
mode).
Table 2-16. PCI/PCI-X Mode and Frequency Encoding (Sheet 1 of 2)
PAPCIXCAP
(on the card)
PCI Capability
PCI-X Capability
PAM66EN
PA133EN
33 MHz
66 MHz
33 MHz
66 MHz
33 MHz
66 MHz
33 MHz
Not Capable
Not Capable
GND
Pull-up
X
GND
X
X
GND
PCI-X 66 MHz
PCI-X 66 MHz
PCI-X 100 MHz
PCI-X 100 MHz
PCI-X 133 MHz
GND
Pull-down
No Connect
GND
X
Pull-down
Pull-down
Pull-down
Pull-up
Capacitor to GND
Capacitor to GND
Capacitor to GND
No Connect
GND
34
Intel® 6702PXH 64-bit PCI Hub Datasheet
INTEL [ INTEL ]
