American Megatrends MI941 User manual

MI941
LGA775 Core2 Duo
Intel®G41 Chipset
Mini-ITX Motherboard
USER’S MANUAL
Version 1.0A

Acknowledgments
AMI is a registered trademark of American Megatrends, Inc.
PS/2 is a trademark of International Business Machines
Corporation.
Intel is a trademark or registered trademark of Intel Corporation.
Microsoft Windows is a registered trademark of Microsoft
Corporation.
Winbond is a registered trademark of Winbond Electronics
Corporation.
All other product names or trademarks are properties of their
respective owners.

MI941 User’s Manual iii
Table of Contents
Introduction.......................................................1
Checklist..............................................................................1
Product Description.............................................................2
Specifications......................................................................3
Board Dimensions...............................................................4
Installations.......................................................5
Installing the CPU...............................................................6
ATX Power Installation ......................................................6
Installing the Memory.........................................................7
Setting the Jumpers .............................................................8
Connectors on MI941........................................................11
BIOS Setup.......................................................19
Drivers Installation......................................41
Intel Chipset Software Installation Utility.........................42
Intel G41 Chipset Family Graphics Driver Installation ....45
Realtek High Definition Audio Driver Installation...........48
Intel PRO LAN Network Drivers Installation...................50
Appendix...........................................................54
A. I/O Port Address Map...................................................54
B. Interrupt Request Lines (IRQ)......................................55
C. Watchdog Timer Configuration....................................56

iv MI941 User’s Manual
This page is intentionally left blank.

INTRODUCTION
MI941 User’s Manual 1
Introduction
Checklist
Your MI941 Core 2 Duo motherboard package should include the items
listed below:
The MI941 motherboard
This User’s manual
1 x I/O shield
1 x IDE cable
1 x SATA cable
1 CD containing the following:
Chipset Drivers
Flash Memory Utility

INSTALLATIONS
2 MI941 User’s Manual
Product Description
The MI941 Mini-ITX motherboard is designed for either the Intel
Core2 Duo or Core2 Quad processors of up to 1333MHz FSB.
It is based on the Intel G41 Express chipset and it comes with two
dual-channel DDR3 memory slots and 4GB memory capacity for
faster system responsiveness and support of 64-bit computing.
Dual independent display comes to life with the onboard Intel
G41 integrated graphics with CRT and DVI display interface. LAN
functionality is supported with a single Gigabit Ethernet
controllers.
MI941 is supports high-end features including high definition
audio, ten fast USB 2.0 ports, four SATAII and an eSATA port,
watchdog timer, digital I/O and four serial ports. Board
dimensions are 170mm by 170mm.
MI941 FEATURES
Supports Intel® Core™2 Quad / Core™2 Duo /
Pentium® Dual Core/ Celeron® processors
800MHz/1066MHz/1333MHz FSB
DDR3 DIMM x2, Max. 4GB
Single Gigabit LAN
Integrated G41 VGA for CRT & DVI interface
6x USB 2.0, 4x SATA II, 2x COM
HD audio, Watchdog timer, 1x PCI , 1x PCI-E x1

INTRODUCTION
MI941 User’s Manual 3
Specifications
Form Factor Mini ITX
Processor Supports Intel®Core TM 2 Quad /Core TM 2 Duo/ Celeron®processor
LGA775 socket
FSB 800/1066/1333 MHz
Chipset Intel®G41 Chipset consisting of:
Intel® 82G41 Graphic Memory Controller Hub (GMCH) (25W)
Intel®82801GB (ICH7) I/O Controller Hub(3.3W)
BIOS Phoenix BIOS
Memory Two 240-pin DDRIII 800/1066 DIMM sockets
Supports max. 4 GB system memory
Video Intel G41 integrated graphic subsystem(GMA X4500) , dual
independent display available through on-board VGA and DVI-D
LAN 1. Intel 82583V PCI Express Gigabit LAN controller x1
USB Intel ICH7 built-in USB 2.0 host controller, supports 6 ports:
- 4 ports in the rear I/O region, 2 ports with on-board headers
SATA II Intel ICH7 built-in SATA II controller (3.0Gb/sec) w/ 4 ports
IDE ICH7 built-in one channel Ultra DMA 33/66/100
Audio Intel ICH7 built-in high definition audio w/ Realtek ALC662 Codec
LPC I/O Winbond W83627DHG-P: COM1 (RS232), COM2
(RS232/422/485) & Hardware monitor
Hardware Monitor One fan connectors with tachometer support
CPU fan connector supports 4-wire fan with PWM control
Supports three thermal diodes (CPU die + 2 on-board)
Voltage monitoring for VCC (processor), 3.3V, 5V, and 12V
Edge Connectors PS/2 stack connector x1 for KB/MS
DB9 connector x 1 for COM1
Stack connector x 1 for VGA+DVI-D
RJ45 + dual USB stack connector x1 for LAN1 & USB1~2
Stack dual USB connector x1 for USB 3 & 4
Triple (3x1) phone jack stack connector x1 for High-Definition Audio
On Board Headers
/ Connectors Standard SATA (7-pin shrouded vertical) connector x4
2x4 pins pin-header x1 for USB 5-6
2x5 pins DF11-10 x1 for COM2 (RS232/422/485)
2x5 pins pin-header x1 for Digital I/O
2x5 pins pin-header x1 for front panel audio
40 pins box-header x1 for IDE
4 pins pin-header x1 for CPU fan & 3 pins pin-header x2 system fan
Expansion PCI +PCI-e(x1) slot x1
2x8 pins pin header x1 for adaptor card:
ID394 (4 serial ports)
ID395 (TPM function)
RTC ICH7 built-in RTC with on-board lithium battery
Watchdog Timer Yes (256 segments, 0, 1, 2…255 sec/min)
Digital IO 4 in and 4 Out
Other LAN Wakeup
Power Connector ATX
System Voltage +5V, +3.3V, +12V, -12V & 5VSB
RoHS Compliant Yes
Board Size 170 x 170mm

INSTALLATIONS
Board Dimensions
4 MI941 User’s Manual

INSTALLATIONS
MI941 User’s Manual 5
Installations
This section provides information on how to use the jumpers and
connectors on the MI941 in order to set up a workable system. The
topics covered are:
Installing the CPU ................................................................................. 6
ATX Power Installation......................................................................... 6
Installing the Memory ........................................................................... 7
Setting the Jumpers................................................................................ 8
Connectors on MI941.......................................................................... 11

INSTALLATIONS
Installing the CPU
The MI941 motherboard supports an LGA 775 processor socket for
Intel® Core 2 Duo processors.
The LGA 775 processor socket comes with a lever to secure the
processor. Refer to the pictures below, from left to right, on how to place
the processor into the CPU socket. Please note that the cover of the
LGA775 socket must always be installed during transport to avoid
damage to the socket.
ATX Power Installation
The system power is provided to the motherboard with the ATX2 and
ATX1 power connectors. ATX2 is a 24-pin power connector and ATX1
is a 4-pin 12V power connector.
The 24-pin power connector can to be connected to a standard 20-pin
ATX power connector in a standard ATX power supply (Min. 400watt).
Note: The power supply 5VSB voltage must be at least 2A.
6 MI941 User’s Manual

INSTALLATIONS
MI941 User’s Manual 7
Installing the Memory
The MI941 motherboard supports two DDR3 memory sockets for a
maximum total memory of 4GB. It supports DDR3 800/1066MHz.
Basically, the system memory interface has the following features:
Supports two 64-bit wide DDR data channels
Available bandwidth up to 6.4GB/s (DDR3 1066) for two-channel
mode.
Supports 512Mb, 1Gb DDR3 technologies.
Supports only x8, x16, DDR3 devices with four banks
Supports only unbuffered DIMMs
Supports opportunistic refresh
Up to 32 simultaneously open pages (four per row, four rows
maximum)

INSTALLATIONS
8 MI941 User’s Manual
Setting the Jumpers
Jumpers are used on the motherboard are used to select various settings
and features according to your needs and applications. Contact your
supplier if you have doubts about the best configuration for your needs.
The following lists the connectors and their respective functions.
Jumper Locations on MI941..................................................................9
JP1, JP2, JP3: RS232/422/485 (COM2) Selection ..............................10
JP6: Clear CMOS Contents .................................................................10

INSTALLATIONS
Jumper Locations on MI941
JP1, JP2, JP3: RS232/422/485 (COM2) Selection.............................. 10
JP6: Clear CMOS Contents................................................................. 10
MI941 User’s Manual 9

INSTALLATIONS
JP1, JP2, JP3: RS232/422/485 (COM2) Selection
COM2 is selectable for RS232, RS-422 and RS-485.
COM2
Function RS-232 RS-422 RS-485
Jumper
Setting
(pin closed)
JP1:
1-2
JP2:
3-5 & 4-6
JP3:
3-5 & 4-6
JP1:
3-4
JP2:
1-3 & 2-4
JP3:
1-3 & 2-4
JP1:
5-6
JP2:
1-3 & 2-4
JP3:
1-3 & 2-4
JP6: Clear CMOS Contents
Use JP6, a 3-pin header, to clear the CMOS contents.
Note that the ATX-power connector should be disconnected from the
motherboard before clearing CMOS.
JP6 Setting Function
Pin 1-2
Short/Closed Normal
Pin 2-3
Short/Closed Clear CMOS
10 MI941 User’s Manual

INSTALLATIONS
MI941 User’s Manual 11
Connectors on MI941
The connectors on MI941 allow you to connect external devices such as
keyboard, floppy disk drives, hard disk drives, printers, etc. The
following table lists the connectors on MI941 and their respective
functions.
ATX2: 24-pin ATX Power Connector ................................................ 13
ATX1: ATX 12V Power Connector.................................................... 13
DDRIII1: Channel A DDR3 Socket.................................................... 13
DDRIII2: Channel B DDR3 Socket .................................................... 13
CPU_FAN1: CPU Fan Power Connector............................................ 13
SYS_FAN1: System Fan1 Power Connector...................................... 13
SYS_FAN2: System Fan2 Power Connector...................................... 14
CN1: Serial Ports(COM1)................................................................... 14
CN5: Gigabit LAN (Intel 82583V) RJ-45 &USB 0/1 Connector ....... 15
CN6: DVI-D+CRT Connector ............................................................ 15
CN7: USB 2/3 Connector.................................................................... 15
CN12: PS/2 Keyboard and PS/2 Mouse Connectors........................... 16
CN13: Audio Connector...................................................................... 16
CN8, CN9, CN10, CN11: SATA HDD Connectors............................ 16
J1: Digital I/O Connector (4 in, 4 out)................................................. 16
J5: SPI Debug Tools Port (Factory use only) ............................................ 17
J8: Power LED .................................................................................... 17
J9: System Function Connector........................................................... 17
J10: USB 4/5 Connector...................................................................... 18
J11: For LPC I/F Adaptor Card........................................................... 18
J13: Audio Front Header..................................................................... 18
IDE1: Primary IDE Connectors........................................................... 18
PCI1: PCI Slot (supports two masters)................................................ 18
PCIE1: x1 PCI Express Slot................................................................ 18

INSTALLATIONS
Connector Locations on MI941
ATX2: 24-pin ATX Power Connector ...................................................................................................13
ATX1: ATX 12V Power Connector.......................................................................................................13
DDRIII1: Channel A DDR3 Socket.......................................................................................................13
DDRIII2: Channel B DDR3 Socket .......................................................................................................13
CPU_FAN1: CPU Fan Power Connector...............................................................................................13
SYS_FAN1: System Fan1 Power Connector.........................................................................................13
SYS_FAN2: System Fan2 Power Connector.........................................................................................14
CN1: Serial Ports(COM1) ......................................................................................................................14
CN5: Gigabit LAN (Intel 82583V) RJ-45 &USB 0/1 Connector..........................................................15
CN6: DVI-D+CRT Connector................................................................................................................15
CN7: USB 2/3 Connector.......................................................................................................................15
CN12: PS/2 Keyboard and PS/2 Mouse Connectors .............................................................................16
CN13: Audio Connector.........................................................................................................................16
CN8, CN9, CN10, CN11: SATA HDD Connectors ..............................................................................16
J1: Digital I/O Connector (4 in, 4 out) ...................................................................................................16
J5: SPI Debug Tools Port (Factory use only).........................................................................................17
J8: Power LED........................................................................................................................................17
J9: System Function Connector..............................................................................................................17
J10: USB 4/5 Connector.........................................................................................................................18
J11: For LPC I/F Adaptor Card ..............................................................................................................18
J13: Audio Front Header ........................................................................................................................18
IDE1: Primary IDE Connectors..............................................................................................................18
PCI1: PCI Slot (supports two masters)...................................................................................................18
PCIE1: x1 PCI Express Slot ...................................................................................................................18
12 MI941 User’s Manual

INSTALLATIONS
ATX2: 24-pin ATX Power Connector
Signal Name Pin # Pin # Signal Name
3.3V 13 1 3.3V
-12V 14 2 3.3V
Ground 15 3 Ground
PS-ON 16 4 +5V
Ground 17 5 Ground
Ground 18 6 +5V
Ground 19 7 Ground
-5V 20 8 Power good
+5V 21 9 5VSB
+5V 22 10 +12V
+5V 23 11 +12V
Ground 24 12 +3.3V
ATX1: ATX 12V Power Connector
This connector supplies the CPU operating voltage.
Pin # Signal Name
1 Ground
2 Ground
3 +12V
4 +12V
DDRIII1: Channel A DDR3 Socket
DDRIII2: Channel B DDR3 Socket
CPU_FAN1: CPU Fan Power Connector
Pin # Signal Name
1 Ground
2 +12V
3 Rotation detection
4 Control
SYS_FAN1: System Fan1 Power Connector
Pin # Signal Name
1 Ground
2 +12V
3 Rotation detection
MI941 User’s Manual 13

INSTALLATIONS
SYS_FAN2: System Fan2 Power Connector
14 MI941 User’s Manual
Pin # Signal Name
1 Ground
2 +12V
3 Rotation detection
CN1: Serial Ports(COM1)
CN1 (COM1) is a DB-9 connector,
Signal Name Pin # Pin # Signal Name
DCD, Data carrier detect 1 6 DSR, Data set ready
RXD, Receive data 2 7 RTS, Request to send
TXD, Transmit data 3 8 CTS, Clear to send
DTR, Data terminal ready 4 9 RI, Ring indicator
GND, ground 5 10 Not Used
J2: COM2 is jumper selectable for RS-232, RS-422 and RS-485.
Pin # Signal Name
RS-232 R2-422 RS-485
1 DCD TX- DATA-
2 RX TX+ DATA+
3 TX RX+ NC
4 DTR RX- NC
5 Ground Ground Ground
6 DSR NC NC
7 RTS NC NC
8 CTS NC NC
9 RI NC NC
10 NC NC NC

INSTALLATIONS
CN5: Gigabit LAN (Intel 82583V) RJ-45 &USB 0/1 Connector
CN6: DVI-D+CRT Connector
Signal Name Pin # Pin # Signal Name
Red 1 2 Green
Blue 3 4 N.C.
GND 5 6 GND
GND 7 8 GND
VCC 9 10 GND
N.C. 11 12 DDCDATA
HSYNC 13 14 VSYNC
DDCCLK 15
Signal Name Pin # Pin # Signal Name
DATA2- 1 2 DATA2+
GND 3 4 N.C.
N.C. 5 6 DDCCLK
DDCDATA 7 8 N.C.
DATA1- 9 10 DATA1+
GND 11 12 N.C.
N.C. 13 14 VCC
GND 15 16 Hot Plug
Detect
DATA0- 17 18 DATA0+
GND 19 20 N.C.
N.C. 21 22 GND
CLK+ 23 24 CLK-
CN7: USB 2/3 Connector
MI941 User’s Manual 15

INSTALLATIONS
16 MI941 User’s Manual
CN12: PS/2 Keyboard and PS/2 Mouse Connectors
Mouse (top)
Keyboard (bottom)
Keyboard Signal Pin # Mouse Signal
Keyboard data 1 Mouse data
N.C. 2 N.C.
GND 3 GND
5V 4 5V
Keyboard clock 5 Mouse clock
N.C. 6 N.C.
CN13: Audio Connector
CN13 is a 3-jack audio connector.
CN8, CN9, CN10, CN11: SATA HDD Connectors
Pin # Signal Name
1 Ground
2 TX+
3 TX-
4 Ground
5 RX-
6 RX+
7 Ground
J1: Digital I/O Connector (4 in, 4 out)
J1 supports TTL levels and is used to control external devices requiring
ON/OFF circuitry.
Signal Name Pin # Pin # Signal Name
Ground 1 2 +5V
Out3 3 4 Out1
Out2 5 6 Out0
IN3 7 8 IN1
IN2 9 10 IN0