82870P2P64H2 Datasheet, PDF (128/217 Pages) –

Functional Description
R
4.2.10 System Initialization
Encoding on the PxM66EN and PxPCIXCAP pin as shown below identifies the capabilities of the
system. The following tables are included from the PCI-X Addendum to the PCI Local Bus
Specification, Revision 1.0 for easy reference.
Table 28. M66EN and PCIXCAP Encoding
PxM66EN
Ground
Not connected
Ground
Not connected
Ground
Not connected
PxPCIXCAP
Ground
Ground
Pull-down
Pull-down
Not connected
Not connected
PCI Capability
33 MHz
66 MHz
33 MHz
66 MHz
33 MHz
66 MHz
PCI-X Capability
Not capable
Not capable
PCI-X 66 MHz
PCI-X 66 MHz
PCI-X 133 MHz
PCI-X 133 MHz
Table 29. PCI-X Initialization Pattern
PxDEVSEL#
PxSTOP#
PxTRDY#
Mode
Deasserted
Deasserted
Deasserted
Deasserted
Asserted
Asserted
Asserted
Asserted
Deasserted
Deasserted
Asserted
Asserted
Deasserted
Deasserted
Asserted
Asserted
Deasserted
Asserted
Deasserted
Asserted
Deasserted
Asserted
Deasserted
Asserted
PCI 33
PCI 66
PCI-X
PCI-X
PCI-X
PCI-X
PCI-X
PCI-X
PCI-X
Clock Period
(ns)
Max
Min
∞
30
30
15
20
15
15
10
10
7.5
Clock Freq
(MHz)
Min
Max
0
33
33
66
50
66
66
100
100
133
Reserved
128
Intel^® 82870P2 P64H2 Datasheet