22 Intel
®
E7520 Memory Controller Hub (MCH) Datasheet
Introduction
1.3.5 Intel
®
6700PXH 64-bit PCI Hub
The Intel
®
6700PXH 64-bit PCH Hub provides the connection between a PCI Express interface
and two independent PCI bus interfaces configurable for standard PCI 2.3 protocol, as well as the
enhanced high-frequency PCI-X 1.0b protocol. Throughout this document this will be routinely
referred to as the “PXH”. The PXH provides configurable support for 32- or 64-bit PCI devices, as
well as support for interface operation at 33 MHz, 66 MHz, 100 MHz, or 133 MHz.
1.3.6 Platform Summary
Figure 1-1 summarizes one possible system configuration using the MCH and associated
peripheral components.
Figure 1-1. System Block Diagram
Processor Processor
DIMM
DIMM
32GB Maximum DDR266
16 GB MaximumDDR 333 or DDR2-400
MCH
DMA
Intel®
82801ER
ICH5R
HI 1.5
PCI 2.3
32-bit
33 MHz
FWH
USB 2.0
8 Ports
SATA
2 Ports
ATA/100
2 Ports
Three Configurable x8 PCI Express Ports
Each port may optionally be configured as two independent x4 ports
I/O Processor TOE / iSCSI
3rd Party
Devices
2x GbE
Dual Gb Ethernet
PCI/PCI-X Bridge
Intel
® 6700PXH
Dual PCI-X