Intel PMB-531LF user manual Dram Timeing Selectable, CAS Latency Time, Dram RAS# to CAS# Delay

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Chapter 4 Award BIOS Setup

This parameter allows you to configure the system based on the specific features of the installed chipset. The chipset manages bus speed and access to system memory resources, such as DRAM and the external cache.

It also coordinates communications between conventional ISA bus and the PCI bus. It must be stated that these items should never need to be altered. The default settings have been chosen because they provide the best opera- ting conditions for the system. The only time you might consider making any changes would be if you discovered that data was being lost while using your system.

DRAM TIMEING SELECTABLE:

The value in this field depends on performance parameters of the installed memory chips (DRAM). Do not change the value from the factory setting unless you install new memory that has a different performance rating than the original DRAMs.

CAS LATENCY TIME:

When synchronous DRAM is installed, the number of clock cycles of CAS latency depends on the DRAM timing.

DRAM RAS# TO CAS# DELAY:

This item let you insert a timing delay between the CAS and RAS strobe signals, used when DRAM is written to, read from, or refreshed. Fast gives faster performance; and Slow gives more stable performance. This field applies only when synchronous DRAM is installed in the system. The choices are 2 and 3.

DRAM RAS# PRECHARGE TIME:

If an insufficient number of cycles is allowed for the RAS to accumulate its charge before DRAM refresh, the refresh may be incomplete and the DRAM may fail to retain data. Fast gives faster performance; and Slow gives more stable performance. This field applies only when synchronous DRAM is installed in the system. The choices are 2 & 3.

PRECHARGE DEALY (tRAS):

Precharge Delay This setting controls the precharge delay, which determines the timing delay for DRAM precharge

System Memory Frequency:

Allow to choose different frequency of memory module.

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PMB-531LF USERS MANUAL

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Contents USER’S Manual PMB-531LF Intel Core Duo/Solo FCC Notice Table of Contents Appendix Expansion BUS Introduction About this Manual Hardware ConfigurationCPU System SpecificationsIDE Interface Irda Port Safety Precautions Hardware JKBMS1 Jumper & Connector Quick Reference TableComponent Locations PMB-531LF Connector, Jumper and Component locationsJumpers and Caps HOW to SET the JumpersJumper Settings Jumper DiagramsRS-232 RS-422 RS-485 COM Port ConnectorDCD3 COM3/4 RI & Voltage Selection COM4 RS232/422/485 COM2 Selection Jumper Settings Function Pin closed IllustrationsPS/2 Keyboard and Mouse Connector Reset ConnectorJPANEL1 13, 15 Reset Connector JPANEL1 14, 16 ATX Power Button Hard Disk Drive LED ConnectorATX Power Button External Speaker ConnectorPower LED Connector Clear Cmos Data SelectionKeep Cmos System FAN Connector CPU FAN ConnectorPIN Assignment Hard Disk Drive ConnectorVGA Connector Serial ATA Connector Universal Serial BUS Connector MDI3N USB&LAN ConnectorATX Power Connector Irda ConnectorSound Connector Lvds Connector Audio CD-IN ConnectorLvds Panel Voltage Selection Inverter ConnectorFSB Frequency Selection Selections Jumper Setting Jumper Illustrations Power State SelectionSelections Jumper Setting Jumper Illustration RESET/ NMI SelectionsClose CF Card MASTER/SLAVE SelectionsTV OUT Connector Memory InstallationTotal memory size Software Utilities Filename Purpose Assume that CD ROM drive is D IntroductionVGA Driver Utility Installation of VGA DriverFlash Bios Update System Bios UpdateTo update VGA Bios for LCD Flat Panel Display Page3-5 Introduction LAN Driver UtilitySound Driver Utility Installation Procedure for Windows 2000/XP/2003Installation of Utility for Windows 2000/XP/2003 Intel Chipset Software Installation UtilityInstallation of Utility for Windows 2000/XP USB2.0 Software Installation UtilityInstallation of Utility for Windows 2000/2003/XP RAID Software Installation UtilityExample Code Watchdog Timer ConfigurationPage3-12 Award Bios Setup Introduction Setup program initial screen Entering SetupCmos Setup screen Standard Cmos FeaturesTime Extended Memory VideoHalt on Base MemoryAward Hard Disk Type Table Hard Disk AttributesBios Features Setup Screen Advanced Bios FeaturesThermal Management The used Thermal Monitor C1E Function CPU FeatureDelay Prior to Thermal Execute Disable BitHard Disk Boot Priority FIRST/SECOND/ THIRD/ Other Boot DeviceSecurity Option MPS Version Control for OS Advanced Chipset FeaturesApic Mode Chipset Features Setup ScreenDram RAS# Precharge Time Dram RAS# to CAS# DelayDram Timeing Selectable CAS Latency TimeBoot Display System Bios CacheableVideo Bios Cacheable Dvmt ModeIntegrated Peripherals Integrated Peripherals Setup ScreenOnChip Primary PCI IDE IDE HDD Block ModeIDE DMA Transfer Access Onchip IDE DevicePrimary Master/Slave Udma Secondary Master/Slave Udma Sata ModePata IDE Mode Secondary Master/Slave PIOUSB Keyboard Support Onboard DeviceUSB Controller USB 2.0 ControllerSuper IO Device Onboard Serial PortWatchdog Support SOFT-OFF by PWR-BTTN Power Management SetupPower Management Setup Screen Acpi FunctionInit Display First PNP/PCI ConfigurationPNP/PCI Configuration Setup Screen Reset Configuration DataIRQ-n Assigned to IRQ ResourcesVcore Shutdown TemperatureCurrent CPU Temperature PC Health StatusLoad Optimized Defaults Load FAIL-SAFE DefaultsPassword Setting To SET a PasswordTo Disable the Password Save & Exit Setup Exit Without Saving Expansion BUS A-2 MINI-PCI BUS Connector PIN AssignmentA-3 PIN Assignment Compact Flash Card Connector PIN AssignmentTechnical Summary Block Diagram IRQ Assignment Interrupt MAPCode Assignment RTC & Cmos RAM MAPTimer & DMA Channels MAP Timer Channel Map AssignmentDMA Channel Map Assignment Memory MAP Memory MapMap