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 2-4 shows the functions provided by the support components.

 

Table 2-4

 

Support Component Functions

 

 

Component Name

Function

 

 

LPC47B397 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

 

 

BCM5751 Ethernet Controller

10/100/1000 Fast Ethernet network interface controller.

 

 

AD1981B Audio Codec

Audio mixer

 

Digital-to-analog converter

 

Analog-to-digital converter

 

Analog I/O

 

6-channel audio support

 

 

2.4.4 System Memory

✎

✎

These systems implement a dual-channel Double Data Rate (DDR) memory architecture. All dx6100 and dc7100 models support PC2700 (333- MHz) and PC3200 (400-MHz) DIMMs. Only dx6120 models support DDR2, PC2-4300 (533-MHz) DIMMs.

DDR and DDR2 DIMMs are NOT interchangeable. Memory type is defined by the system board.

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.

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361834-002

Technical Reference Guide