2-22 www.hp.com Technical Reference Guide
System Overview
2.4.3 Support Components
Input/output functions not provided by the chipset are handled by other support components.
Some of these components also provide “housekeeping” and various other functions as well.
Table 2-5 shows the functions provided by the support components.
2.4.4 System Memory
These systems implement a dual-channel Double Data Rate (DDR2) memory architecture. All
models support PC2-4200 (533-MHz) DIMMs.
✎
DDR and DDR2 DIMMs are NOT interchangeable.
The USDT system provides three DIMM sockets supporting up to 3 GB of memory while all
other form factors provide four DIMM sockets and support a total of four gigabytes of memory.
✎
The maximum memory amounts stated above are with 1-GB memory modules using 1-Gb
technology DIMMs.
Table 2-5
Support Component Functions
Component Name Function
SCH5307 I/O Controller Keyboard and pointing device I/F
Diskette I/F
Serial I/F (COM1and COM2)
Parallel I/F (LPT1, LPT2, or LPT3)
PCI reset generation
Interrupt (IRQ) serializer
Power button and front panel LED logic
GPIO ports
Processor over tempurature monitoring
Fan control and monitoring
Power supply voltage monitoring
SMBus and Low Pin Count (LPC) bus I/F
BCM5752 Ethernet Controller 10/100/1000 Fast Ethernet network interface
controller.
ALC260 HD Audio Codec Audio mixer
One digital-to-analog 2-channel converter
Two analog-to-digital 2-channel converters
Analog I/O
2-channel audio support
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