2-8 www.hp.com Technical Reference Guide
System Overview
2.3.3 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 2-4 shows the functions provided by the support components.
NOTE:
[1] Not used in USDT form factor.
2.3.4 System Memory
These systems implement a dual-channel Double Data Rate (DDR2) memory architecture. All
models support DDR2 800- and 667-MHz DIMMs.
✎
DDR and DDR2 DIMMs are NOT interchangeable.
The USDT system provides two SODIMM sockets supporting up to four gigabytes of memory
while the SFF and CMT form factors provide four DIMM sockets and support a total of eight
gigabytes of memory.
✎
SODIMM and DIMM components are NOT interchangeable.
Table 2-4
Support Component Functions
Component Name Function
SCH5327 I/O Controller Keyboard and pointing device I/F
Diskette I/F [1]
Serial I/F (COM1and COM2) [1]
Parallel I/F (LPT1, LPT2, or LPT3) [1]
PCI reset generation
Interrupt (IRQ) serializer
Power button and front panel LED logic
GPIO ports
Processor over temperature monitoring
Fan control and monitoring
Power supply voltage monitoring
SMBus and Low Pin Count (LPC) bus I/F
Intel 82566DM Network Interface
Controller
10/100/1000 Fast Ethernet network interface controller.
AD1884 HD Audio Codec Audio mixer
Two digital-to-analog 2-channel converters
Two analog-to-digital 2-channel converters
Analog I/O
Supports two 2-channel (stereo) audio streams
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