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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] Com1 supported only on SFF and CMT form factors. COM2 requires external bracket/cable
assembly.
[3] Supported only on SFF and CMT form factors, requires external bracket/cable assembly.
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. The USDT system provides two SODIMM
sockets supporting up to eight gigabytes of memory while the SFF and CMT form factors
provide four DIMM sockets and support a total of 16 gigabytes of memory.
✎
DDR and DDR2 DIMMs are NOT interchangeable.
✎
SODIMM and DIMM components are NOT interchangeable.
Table 2-4
Support Component Functions
Component Name Function
WPCD376H SIO Controller Keyboard and pointing device I/F
Diskette I/F [1]
Serial I/F (COM1and COM2) [2]
Parallel I/F (LPT1, LPT2, or LPT3) [3]
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 82567LM Network Interface
Controller
10/100/1000 Fast Ethernet network interface controller.
AD1884A HD Audio Codec Audio mixer
Two digital-to-analog stereo converters
Two analog-to-digital stereo converters
Analog I/O
Supports stereo (two-channel) audio streams