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Intel
®
IQ31244 Customer Reference Board
User’s Manual 7
1.0 Introduction
The Intel
®
IQ31244 Customer Reference Board (hereafter called “IQ31244”) is a FlexATX
motherboard based on the Intel
®
80321 I/O Processor. The Intel
®
third-party part number for this
motherboard is MB-701.
This platform is capable of operating at a maximum of 100 MHz PCI-X on both the secondary and
primary PCI buses (refer to Figure 1). The IQ31244 features Intel
®
31244 PCI-X to Serial ATA
Controllers on the secondary side of an Intel
®
31154 133 MHz PCI Bridge. The IQ31244 also
includes an Intel
®
82546 Dual-Port Gigabit Ethernet Controller, a 64-bit PCI-X expansion slot, and
various features on the 80321 peripheral bus interface (PBI). The Intel
®
31154 133 MHz PCI
Bridge provides a PCI-X bridge, which allows direct peer-to-peer communication between the
processor and the four 31244 PCI-X to Serial ATA Controllers on the secondary PCI-X 64-bit bus
with frequency of 100 MHz. The IQ31244 provides sixteen Serial ATA connectors, since each
Serial ATA has four SATA channels. The Intel
®
82546EB Dual-Port Gigabit Ethernet Controller
interface has two network ports. The Intel
®
80321 I/O Processor also provides the DDR SDRAM
memory controller. The IQ31244 processor peripheral bus interface operates at a frequency of
33 MHz frequency with flash ROM, CompactFlash*, UART, Hex Display LEDs, and rotary
switch.
A block diagram of IQ31244 is shown in Figure 1.