Intel Xeon User Manual

Intel
®
82870P2 (P64H2)
94 Design Guide
8.1.1 PCI/PCI-X Routing Requirements (No Hot Plug)
The P64H2 supports a large number of PCI/PCI-X configurations. The basic topology of the bus is
shown in Figure 8-1. Multiple slots are connected in a daisy chain topology with the device(s)
down on the motherboard at the end of the daisy chain. Table 8-2 documents the lengths for the
configurations Intel simulated.
NOTE: During simulation, slot to slot lengths were held constant for some configurations. Therefore, no range
can be given for these length requirements.
Figure 8-1. Typical PCI/PCI-X Routing
Table 8-2. Intel
®
P64H2 PCI/PCI-X Configuration Length Requirements
Configuration
Intel
®
P64H2
to Slot
Slot to Slot Slot to Device Down
33 MHz, 5 slots / 1 device down 2.0” – 7.0” 1.0” 3.0” – 6.0”
66 MHz, 4 slots / 0 devices down 6.0” – 8.0” 1.5” N/A
100 MHz, 2 slots / 0 devices down 5.0” – 8.0” 1.0” – 1.75” N/A
100 MHz, 2 slots / 1 device down 3.0” – 3.5” 0.75” 2.5” – 3.0”
100 MHz, 1 slot / 2 devices down 2.0” – 4.0” (device to device) 2.0” 5.0”
133 MHz, 1 slot / 0 devices down 1.0” – 6.0” N/A N/A
Intel
®
P64H2
P64H2 to Slot
Slot to
Device Down
Slot
to Slot
Slot 1
Slot 2
Device
Down

Intel Xeon Specifications

General

Brand	Intel
Model	Xeon
Category	Processor
Language	English