HP dc7800 Support Components, System Memory, Support Component Functions, Component Name Function

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.

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	10/100/1000 Fast Ethernet network interface controller.
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

NOTE:

[1]Not used in USDT form factor.

2.3.4System 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.

2-8 www.hp.com Technical Reference Guide