Intel MB820 user manual J11 Digital I/O Connector 4 in, 4 out, J12 System Function Connector

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INSTALLATIONS

J11: Digital I/O Connector (4 in, 4 out)

This 12-pin Digital I/O connector supports TTL levels and is used to control external devices requiring ON/OFF circuitry.

Signal Name	Pin #	Pin #	Signal Name
IN0	1	7	+5V
IN1	2	8	OUT0
IN2	3	9	Ground
IN3	4	10	OUT1
GROUND	5	11	+12V
OUT2	6	12	OUT3

J12: System Function Connector

J12 provides connectors for system indicators that provide light indication of the computer activities and switches to change the computer status. J12 is a 20-pin header that provides interfaces for the following functions.

Hard Disk Drive LED Not Defined

SMI / Hardware Switch

Speaker

Reset Switch

ATX Power On Switch

Power LED

Speaker: Pins 1 - 4

This connector provides an interface to a speaker for audio tone generation. An 8-ohm speaker is recommended.

Pin #	Signal Name
1	Speaker out
2	No connect
3	Ground
4	+5V

18	MB820 User’s Manual

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Contents USER’S Manual VersionAcknowledgments Table of Contents This page is intentionally left blank Checklist IntroductionProduct Description Board Dimensions Installations ATX Power Installation Installing the MemorySetting the Jumpers Jumper Locations on MB820 JP3 COM2 RS232 +5V/+12V Power Setting JP2 COM1 RS232 +5V/+12V Power SettingJP1 RS232/422/485 COM2 Selection JP5 COM3 RS232 +5V/+12V Power Setting JP4 Clear Cmos ContentsJP6 COM4 RS232 +5V/+12V Power Setting JP8 Onboard VGA Enable/Disable JP7 DiskOnChip Address SelectConnectors on MB820 Connector Locations on MB820 DIMM1, DIMM2 DDR Channel a Connectors ATXP1 ATX Power Supply ConnectorATXP2 ATX 12V Power Connector DIMM3, DIMM4 DDR Channel B ConnectorsCN2 4-port USB Connector CN1 PS/2 Keyboard and PS/2 Mouse ConnectorsCN3, J3 Serial Ports CN4 Parallel Port Connector CN6 VGA CRT ConnectorJ1 IrDA Connector CN7 USB and LAN RJ45 ConnectorsCN8 Audio Connector J4 CD-In Audio ConnectorJ8, J10 COM3 and COM4 Serial Ports Connector J5, J6 Serial ATA Sata ConnectorsJ9 Wake On LAN Connector J11 Digital I/O Connector 4 in, 4 out J12 System Function ConnectorPower LED Pins 11 FAN2 VGA Fan Power Connector FAN1 CPU Fan Power ConnectorFAN3 Chassis Fan Power Connector FDD1 Floppy Drive Connector RM/LCIDE, IDE2 Primary and Secondary IDE Connectors IRQ15Watchdog Timer Configuration Sample CodeMov Cl, 0F5h Call ReadReg Al, not 08h Call WriteReg Out dx, al Installations Bios Setup Bios Introduction Bios SetupPhoenix AwardBIOS Cmos Setup Utility Standard Cmos Setup DateIDE Primary HDDs / IDE Secondary HDDs TimeDrive a / Drive B Video Halt OnQuick Power On Self Test Advanced Bios FeaturesHard Disk Boot Priority CPU L1 and L2 CacheBoot Up Floppy Seek First/Second/Third Boot DeviceBoot Other Device Boot Up NumLock StatusMPS Version Control for OS Apic ModeSecurity Option OS Select for Dram 64MBAdvanced Chipset Features AGP Aperture Size Integrated Peripherals IDEOnChip Primary/Secondary PCI IDE IDE HDD Block ModeIDE DMA Transfer Access IDE Primary/Secondary Master/Slave PIOUSB 2.0 Controller On-Chip Serial ATAUSB Controller USB Keyboard SupportParallel Port Mode Uart Mode SelectChip Select Pin Power Management Power Management SetupAcpi Function Video Off Method Suspend ModeHDD Power Down Video Off In SuspendReload Global Timer Events Power On by RingResume by Alarm Wake Up On LANReset Configuration Data PNP/PCI ConfigurationsPNP OS Install Resources Controlled byShutdown Temperature CPU Warning TemperatureTemperatures/Fan Speeds/Voltages PC Health StatusAuto Detect DIMM/PCI Clk Frequency/Voltage ControlSpread Spectrum Set Supervisor/User Password Load Fail-Safe DefaultsLoad Setup Defaults Save & Exit SetupDrivers Installation Intel 875P Chipset Software Intallation Utility Drivers Installation Drivers Installation Realtek AC97 Codec Audio Driver Installation Intel PRO LAN Drivers Installation VGA Drivers Installation Drivers Installation