1. FEATURES
E670
1. FEATURES
1. FEA TURES
Specifications
1.1 The A7V-VM Motherboard
The A7V-VM motherboard is carefully designed for the demanding PC user who
wants high-performance features in a small package.
1.1.1 Specifications
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AMD Athlon™/Duron™ Processor Support: Supports AMD Athlon™/
Duron™ processor designed for the AMD Athlon™/Duron™ Processor Module (462-pin Socket A).
North Bridge System Chipset: VIA VT8365™ (ProvSavage KM133) integrated
system controller with AGP 4x Graphics core supports a 200MHz Front Side
Bus (FSB), supports up to 1.5GB of PC100 SDRAM/Virtual Channel Memory
(VCM) SDRAM, complies with AGP 2.0 specifications for 4X, 2X, and 1X
AGP modes and PCI 2.2. bus interface with support for 5 PCI masters. It is
optimized to deliver enhanced AMD Athlon™/Duron™ processor system performance.
South Bridge System Chipset: VIA VT82C686A PCIset with PCI Super I/O
integrated peripheral controller supports UltraDMA/66, which allows burst mode
data transfer rates of up to 66.6MB/sec.
PC100 Memory Support: Equipped with two DIMM sockets to support PC100compliant SDRAMs (16, 32, 64, 128, 256, 512MB) up to 1GB.
Super Multi-I/O: Provides two high-speed UART compatible serial ports and
one parallel port with EPP and ECP capabilities.
Expansion Slots: Provides three 32-bit PCI 2.2 slots and one AGP expansion
slot. PCI supports up to 133MB/sec maximum throughput. Each PCI slot can support a Bus Master PCI card, such as a SCSI card.
Wake-Up Support: Supports Wake-On-LAN activity with onboard network
support.
AGP Slot: Supports an Accelerated Graphics Port card for high performance
component level interconnect targeted at 3D graphical display applications using 4X, 2X, or 1X mode bus.
USB: Supports up to 4 USB ports, two on the back panel and two midboard for
more peripheral connectivity options.
UltraDMA/66 & UltraDMA/33: Comes with an onboard PCI Bus Master IDE
controller with two connectors that support four IDE devices on two channels.
Supports UltraDMA/66, UltraDMA/33, PIO Modes 3 & 4 and Bus Master IDE
DMA Mode 2, and Enhanced IDE devices, such as DVD-ROM, CD-ROM, CDR/RW, LS-120, and Tape Backup drives.
Onboard LAN Controller: Features the Realtek 10/100Mb Fast Ethernet Controller, which supports Wired for Management, remote wake-up, and OnNow
initiative to reduce Total Cost of Ownership (TCO).
A7V-VM User’s Manual
1
1. FEATURES
•
1. FEA TURES
Specifications
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Onboard Audio: Hardware AC’97 V2.1 CODEC compliant, Crystal’s 3D sound
circuitry, sample rate conversion from 7kHz to 48kHz.
Infrared Interface: Integrated Serial Infrared interface supports an optional
remote control package for wireless interfacing with external peripherals, personal gadgets, or an optional remote controller.
1.1.2 Performance
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100MHz / 100/MHz Synchronous Host/DRAM Clock Support: CPU frequency can operate at 100MHz while system memory operates at 100MHz.
High-Speed Data Transfer Interface: This motherboard with its chipset and
support for UltraDMA/66 doubles the UltraDMA/33 burst transfer rate to
66.6MB/s. UltraDMA/66 is backward compatible with both DMA/33 and DMA
and with existing DMA devices and systems so there is no need to upgrade
current EIDE/IDE drives and host systems. (UltraDMA/66 requires a 40-pin
80-conductor cable to be enabled and/or for UltraDMA Mode 4.)
Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI master buses to memory to CPU.
SDRAM Optimized Performance: This motherboard supports Synchronous
Dynamic Random Access Memory (SDRAM), which increases the data transfer
rate of 800MB/s max using PC100-compliant SDRAMs.
ACPI Ready: ACPI (Advanced Configuration and Power Interface) provides
more Energy Saving Features for future operating systems (OS) supporting OS
Direct Power Management (OSPM) functionality. With these features implemented in the OS, PCs can be ready around the clock, yet satisfy all the energy
saving standards. To fully utilize the benefits of ACPI, an ACPI-supported OS,
such as Windows 98, must be used.
New Compliancy: Both the BIOS and hardware levels of the motherboard meets
PC 99 compliancy. The new PC 99 requirements for systems and components are
based on the following high-level goals: Support for Plug and Play compatibility
and power management for configuring and managing all system components,
and 32-bit device drivers and installation procedures for Windows 95/98/NT.
A7V-VM User’s Manual
1. FEATURES
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1. FEA TURES
Specifications
1.1.3 Intelligence
Fan Status Monitoring and Alarm: To prevent system overheat and system
damage, the CPU, power supply, and system fans can be monitored for RPM
and failure. All the fans are set for its normal RPM range and alarm thresholds.
Auto Fan Off: The system fans will power off automatically even in sleep
mode. This function reduces both energy consumption and system noise, and is
an important feature to implement silent PC systems.
Remote Ring On (requires modem): This allows a computer with this
motherboard to be turned on remotely through an internal or external modem.
With this feature, users can access their computer from anywhere in the world!
A7V-VM User’s Manual
3
2. HARDWARE SETUP
2.1 A7V-VM Motherboard Layout
PS/2
T: Mouse
B: Keyboard
Top:
Socket A
GAME_AUDIO
VIA
VT8365
Line
Out
Chipset
Line
In
Realtek
Fast
Enternet
Mic
In
CR2032 3V
Lithium Cell
CMOS Power
LCDTV
0 1
FLOPPY
ATXPWR
VGA
PRIMARY IDE
PARALLEL PORT
PS_FAN
SECONDARY IDE
2. H/W SETUP
Motherboard Layout
COM1
DIMM Socket 2 (64/72-bit, 168-pin module)
T: USB1 RJ-45
B: USB2
DIMM Socket 1 (64/72-bit, 168-pin module)
USB
CPU_FAN
2 3
DUCT_FAN
Accelerated Graphics Port (AGP)
Speaker_out
AUX
CLRTC
PCI Slot 1
VIA
VT82C686A
PCI Slot 2
Chipset
2M
flash
ROM
A7V-VM
Audio
Codec
HP-USB
PCI Slot 3
COM2
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A7V-VM User’s Manual
HP-PANEL
Buzzer
2. HARDWARE SETUP
2.2 Layout Contents
Expansion Slots
DIMM1, DIMM2
Socket A
PCI1, PCI2, PCI3
AGP
p. 8 168-Pin DIMM Memory Support
p. 9 Central Processing Unit (CPU)
p.10 32-bit PCI Bus Expansion Slots
p.12 Accelerated Graphics Port
2. H/W SETUP
Layout Contents
1)
2)
3)
4)
Connectors
1) PS2KBMS
2) PS2KBMS
3) USBLAN
4) USBLAN
5) PRINTER
6) COM1/COM2
7) GAME_AUDIO
8) GAME_AUDIO
9) VGA
10) PRIMARY/SECONDARY IDE
11) PS_, CPU_, DOCT_FAN
12) FLOPPY
13) HP_USB
14) CD, AUX, MODEM
15) ATXPWR
16) MLED (PANEL)
17) SMI (PANEL)
18) SPK (PANEL)
19)RESET (PANEL)
20) PLED (PANEL)
21) IDELED (PANEL)
22) PWR (PANEL)
p.13
p.13
p.14
p.14
p.14
p.15
p.15
p.16
p.16
p.17
p.18
p.18
p.19
p.19
p.20
p.21
p.21
p.21
p.21
p.21
p.21
p.21
PS/2 Mouse Connector (6-pin female)
PS/2 Keyboard Connector (6-pin female)
Fast-Ethernet Port Connector
Universal Serial Bus Ports 0 & 1 (Two 4-pin female)
Parallel Port Connector (25-pin female)
Serial Port Connectors (9 pins, 10-1 pins)
Game/MIDI Connector (15-pin female)
Audio Port Connectors (Three 1/8” female)
Monitor Output Connector (15-pin female)
Primary/Secondary IDE Connectors (Two 40-1pins)
Power Supply, CPU, Chassis Fan Connectors (Three 3-pin)
Floppy Disk Drive Connector (34-1pins)
USB Header (12-2 pins)
Internal Audio Connectors (Three 4 pins)
ATX Power Supply Connector (20 pins)
System Message LED Lead (2 pins)
System Management Interrupt Switch Lead (2 pins)
System Warning Speaker Connector (4 pins)
Reset Switch Lead (2 pins)
System Power LED Lead (3 pins)
IDE Activity LED Lead (2 pins)
ATX Power / Soft-Off Switch Lead (2 pins)
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2. HARDWARE SETUP
2.3 Hardware Setup Procedure
Before using your computer, you must complete the following steps:
• Check Motherboard Settings
• Install Memory Modules
• Install the Central Processing Unit (CPU)
• Install Expansion Cards
• Connect Ribbon Cables, Panel Wires, and Power Supply
2. H/W SETUP
Motherboard Settings
WARNING! Computer motherboards and expansion cards contain very delicate Integrated Circuit (IC) chips. To protect them against damage from static electricity, you
should follow some precautions whenever you work on your computer.
1. Unplug your computer when working on the inside.
2. Use a grounded wrist strap before handling computer components. If you do not have
one, touch both of your hands to a safely grounded object or to a metal object, such as
the power supply case.
3. Hold components by the edges and try not to touch the IC chips, leads or connectors, or
other components.
4. Place components on a grounded antistatic pad or on the bag that came with the component whenever the components are separated from the system.
5. Ensure that the ATX power supply is switched off before you plug in or remove the
ATX power connector on the motherboard.
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A7V-VM User’s Manual
2. HARDWARE SETUP
2.4 System Memory (DIMM)
2. H/W SETUP
Motherboard Settings
NOTE: No hardware or BIOS setup is required after adding or removing memory.
This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are
available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Access Memory (SDRAM) of 16, 32, 64, 128MB, 256 or 512MB to form a memory size
between 16MB and 1GB. One side (with memory chips) of the DIMM takes up one
row on the motherboard.
To use the chipset’s Error Checking and Correction (ECC) feature, you must use a
DIMM with 9 chips per side (standard 8 chips/side + 1 ECC chip).
Install memory in any combination as follows:
IMPORTANT
• For optimum signal integrity, inserting the DIMMs in the following order is
recommended: DIMM1, DIMM2.
• SDRAMs used must be compatible with the current PC133/PC100 SDRAM
specification.
Location
168-pin DIMM
Total Memory
DIMM1 (Rows 0&1)
SDRAM 16, 32, 64, 128, 256, 512MB
x1
DIMM2 (Rows 2&3)
SDRAM 16, 32, 64, 128, 256, 512MB
x1
Total System Memory (Max 1GB)
=
2.5.1 General DIMM Notes
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This motherboard supports SPD (Serial Presence Detect) DIMMs. This is the
memory of choice for best performance vs. stability.
This motherboard does NOT support registered memory.
SDRAM chips are generally thinner with higher pin density than EDO (Extended Data Output) chips.
Single-sided DIMMs come in 16, 32, 64,128, 256MB; double-sided come in 32,
64, 128, 256, 512MB.
A7V-VM User’s Manual
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2. HARDWARE SETUP
2.4.2 DIMM Memory Installation
Insert the module(s) as shown. Because the number of pins are different on either
side of the breaks, the module will only fit in the orientation shown. DIMM modules are longer and have different pin contact on each side and therefore have a
higher pin density. SIMM modules have the same pin contact on both sides.
2. H/W SETUP
System Memory
20 Pins
60 Pins
A7V-VM
88 Pins
A7V-VM 168-Pin DIMM Sockets
Lock
The DIMMs must be 3.3V Unbuffered for this motherboard. To determine the DIMM
type, check the notches on the DIMMs (see figure below).
168-Pin DIMM Notch Key Definitions (3.3V)
DRAM Key Position
Unbuffered
RFU
Buffered
Voltage Key Position
Reserved
5.0V
3.3V
The notches on the DIMM module will shift between left, center, or right to identify
the type and also to prevent the wrong type from being inserted into the DIMM slot
on the motherboard. You must ask your retailer the correct DIMM type before purchasing. This motherboard supports four clock signals.
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A7V-VM User’s Manual
2. HARDWARE SETUP
2.5 Central Processing Unit (CPU)
The motherboard provides a ZIF Socket A. The CPU that came with the motherboard should have a fan attached to it to prevent overheating. If this is not the case,
then purchase a fan before you turn on your system.
2. H/W SETUP
System Memory
WARNING! Be sure that there is sufficient air circulation across the processor’s
heatsink by regularly checking that your CPU fan is working. Without sufficient
circulation, the processor could overheat and damage both the processor and the
motherboard. You may install an auxiliary fan, if necessary.
To install a CPU, first turn off your system and remove its cover. Locate the ZIF
socket and open it by first pulling the lever sideways away from the socket then
upwards to a 90-degree angle. Insert the CPU with the correct orientation as shown.
The notched corner should point towards the end of the lever. Because the CPU has
a corner pin for two of the four corners, the CPU will only fit in the orientation as
shown. The picture is for reference only; you should have a CPU fan that covers the
face of the CPU. With the added weight of the CPU fan, no force is required to
insert the CPU. Once completely inserted, close the socket’s lever while holding
down the CPU. After the CPU is , install an Intel recommended fan heatsink. Locate
the CPU fan connector (see 2.1 Motherboard Layout or 2.8 Connectors) and connect the CPU fan cable to it.
CAUTION! Be careful not to scrape the motherboard when mounting a clampstyle processor fan or else damage may occur to the motherboard.
BLANK
LEVER
LOCK
A7V-VM
AMD™ Athlon
NOTCH
A7V-VM Socket A
A7V-VM User’s Manual
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2. HARDWARE SETUP
2.6 Expansion Cards
WARNING! Unplug your power supply when adding or removing expansion
cards or other system components. Failure to do so may cause severe damage to
both your motherboard and expansion cards.
2. H/W SETUP
Expansion Cards
2.6.1 PCI Expansion Card Installation Procedure
1. Read the documentation for your expansion card and make any necessary hardware or software settings for your expansion card, such as jumpers.
2. Remove your computer system’s cover and the bracket plate on the slot you
intend to use. Keep the bracket for possible future use.
3. Carefully align the card’s connectors and press firmly.
4. Secure the card on the slot with the screw you removed above.
5. Replace the computer system’s cover.
6. Set up the BIOS if necessary
7. Install the necessary software drivers for your expansion card.
2.6.2 Assigning IRQs for Expansion Cards
Some expansion cards need an IRQ to operate. Generally, an IRQ must be exclusively assigned to one use. In a standard design, there are 16 IRQs available but
most of them are already in use, leaving 6 IRQs free for expansion cards. If your
motherboard has PCI audio onboard, an additional IRQ will be used. If your motherboard also has MIDI enabled, another IRQ will be used, leaving 4 IRQs free.
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A7V-VM User’s Manual
2. HARDWARE SETUP
The following table lists the default IRQ assignments for standard PC devices. Use
this table when configuring your system and for resolving IRQ conflicts.
Standard Interrupt Assignments
Priority
1
2
N/A
11
12
13
14
15
3
4
5
6
7
8
9
10
Standard Function
System Timer
Keyboard Controller
Programmable Interrupt
Communications Port (COM2)
Communications Port (COM1)
Sound Card (sometimes LPT2)
Floppy Disk Controller
Printer Port (LPT1)
System CMOS/Real Time Clock
ACPI Mode when enabled
LAN Controller
IRQ Holder for PCI Steering
PS/2 Compatible Mouse Port
Numeric Data Processor
Primary IDE Channel
Secondary IDE Channel
2. H/W SETUP
Expansion Cards
IRQ
0
1
2
3*
4*
5*
6
7*
8
9*
10*
11*
12*
13
14*
15*
*These IRQs are usually available for ISA or PCI devices.
Interrupt Request Table for this Motherboard
Interrupt requests are shared as shown by the following table:
PCI slot 1
PCI slot 2
PCI slot 3
AGP slot
Onboard LAN controller
Onboard Audio/AMR
—
—
not shared
INT-A
INT-B
INT-C
INT-D
shared
—
—
shared
—
—
shared
—
—
shared
—
—
not shared
—
—
—
—
—
—
—
—
IMPORTANT: If using PCI cards on shared slots, make sure that the drivers
support “Share IRQ” or that the cards do not need IRQ assignments. Conflicts
will arise between the two PCI groups that will make the system unstable or
cards inoperable.
A7V-VM User’s Manual
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2. HARDWARE SETUP
2.6.3 Accelerated Graphics Port
This motherboard provides an Accelerated Graphics Port (AGP) slot to support a
new generation of graphics cards with ultra-high memory bandwidth, such as an 3D
graphics accelerator.
CAUTION! To avoid damaging your graphics card, it is highly recommended
that you turn off your computer’s power supply before inserting your graphics
card into the slot.
2. H/W SETUP
Expansion Cards
A7V-VM
A7V-VM Accelerated Graphics Port (AGP)
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A7V-VM User’s Manual
2. HARDWARE SETUP
2.7 External Connectors
WARNING! Some pins are used for connectors or power sources. These are
clearly distinguished from jumpers in the Motherboard Layout. Placing jumper
caps over these connector pins will cause damage to your motherboard.
2. H/W SETUP
Connectors
IMPORTANT: Ribbon cables should always be connected with the red stripe to
Pin 1 on the connectors. Pin 1 is usually on the side closest to the power connector on hard drives and CD-ROM drives, but may be on the opposite side on
floppy disk drives. Check the connectors before installation because there may
be exceptions. IDE ribbon cables must be less than 46 cm (18 in.), with the
second drive connector no more than 15 cm (6 in.) from the first connector.
1) PS/2 Mouse Connector (6-pin PS2KBMS)
The system will direct IRQ12 to the PS/2 mouse if one is detected. If one is not
detected, expansion cards can use IRQ12. See PS/2 Mouse Function Control
in 4.4 Advanced Menu.
PS/2 Mouse (6-pin female)
2) PS/2 Keyboard Connector ( 6-pin PS2KBMS)
This connection is for a standard keyboard using an PS/2 plug (mini DIN). This
connector will not allow standard AT size (large DIN) keyboard plugs. You
may use a DIN to mini DIN adapter on standard AT keyboards.
PS/2 Keyboard (6-pin female)
A7V-VM User’s Manual
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2. HARDWARE SETUP
3) Fast-Ethernet Port Connector (USBLAN)
The RJ-45 connector is located on top of the USB connectors. The connector
allows the motherboard to connect to a Local Area Network (LAN) through a
network hub.
RJ-45
2. H/W SETUP
Connectors
4) Universal Serial BUS Ports 0 & 1 (Two 4-pin USBLAN)
Two USB ports are available for connecting USB devices.
Universal Serial Bus (USB)
5) Parallel Port Connector (25-pin PRINTER)
You can enable the parallel port and choose the IRQ through Onboard Parallel
Port in the BIOS.
NOTE: Serial printers must be connected to the serial port.
Parallel (Printer) Port (25-pin female)
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A7V-VM User’s Manual
2. HARDWARE SETUP
2. H/W SETUP
Connectors
6) Serial Port Connectors (9-pin COM1
One serial port is ready for a mouse or other serial devices. A second serial port
is available using a serial port bracket connected from the motherboard to an
expansion slot opening.
COM 1
Serial Port (9-pin male)
COM2
PIN 1
A7V-VM
A7V-VM Serial COM2 Bracket
7) Game/MIDI Connector (15-pin GAME_AUDIO)
You may connect game joysticks or game pads to this connector for playing
games. Connect MIDI devices for playing or editing professional audio.
Game/MIDI (15-pin female)
A7V-VM User’s Manual
15
2. HARDWARE SETUP
8) Audio Port Connectors (Three 1/8” GAME_AUDIO)
Line Out can be connected to headphones or preferably powered speakers. Line
In allows tape players or other audio sources to be recorded by your computer
or played through the Line Out. Mic allows microphones to be connected for
inputting voice.
2. H/W SETUP
Connectors
Line Out Line In Mic
1/8" Stereo Audio Connectors
9) Monitor Output Connector (Blue 15-pin VGA)
This connector is foroutput to a VGA-compatible device.
VGA Monitor (15-pin female)
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A7V-VM User’s Manual
2. HARDWARE SETUP
2. H/W SETUP
Connectors
10) Primary (Blue) / Secondary IDE Connectors
(40-1pin PRIMARY/SECONDARY IDE)
These connectors support the provided UltraDMA/66 IDE hard disk ribbon cable.
Connect the cable’s blue connector to the motherboard’s primary (recommended)
or secondary IDE connector, and then connect the gray connector to your
UltraDMA/66 slave device (hard disk drive) and the black connector to your
UltraDMA/66 master device. It is recommended that non-UltraDMA/66 devices
be connected to the secondary IDE connector. If you install two hard disks, you
must configure the second drive to Slave mode by setting its jumper accordingly. Please refer to your hard disk documentation for the jumper settings. BIOS
now supports specific device bootup. (Pin 20 is removed to prevent inserting
in the wrong orientation when using ribbon cables with pin 20 plugged).
TIP: You may configure two hard disks to be both Masters with two ribbon
cables – one for the primary IDE connector and another for the secondary IDE
connector. You may install one operating system on an IDE drive and another on
a SCSI drive and select the boot disk through the BIOS
A7V-VM
A7V-VM IDE Connectors
Primary IDE Connector
Secondary IDE Connector
IMPORTANT: UltraDMA/66 IDE devices must use a 40-pin 80-conductor IDE
cable for 66MBytes/s transfer rates.
NOTE: Orient the red markings
(usually zigzag) on the IDE
ribbon cable to PIN 1.
PIN 1
A7V-VM User’s Manual
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2. HARDWARE SETUP
11) Power Supply, CPU, and Chassis Fan Connectors
(3-pin PS_FAN, CPU_FAN, DOCT_FAN)
These connectors support cooling fans of 350mA (4.2 Watts) or less. Orientate
the fans so that the heat sink fins allow airflow to go across the onboard heat
sink(s) instead of the expansion slots. Depending on the fan manufacturer, the
wiring and plug may be different. The red wire should be positive, while the
black should be ground. Connect the fan’s plug to the board taking into consideration the polarity of the connector.
2. H/W SETUP
Connectors
GND
+12V
Rotation
WARNING! The CPU and/or motherboard will overheat if there is no airflow
across the CPU and onboard heatsinks. Damage may occur to the motherboard
and/or the CPU fan if these pins are incorrectly used. These are not jumpers,
do not place jumper caps over these pins.
CPU_FAN
Rotation
+12V
GND
DUCT_FAN
GND
FAN_SUS#
GND
A7V-VM
PS_FAN
A7V-VM 12-Volt Cooling Fan Power
12) Floppy Disk Drive Connector (34-1pin FLOPPY)
This connector supports the provided floppy drive ribbon cable. After connecting the single end to the board, connect the two plugs on the other end to the
floppy drives. (Pin 5 is removed to prevent inserting in the wrong orientation when using ribbon cables with pin 5 plugged).
NOTE: Orient the red markings on
the floppy ribbon cable to PIN 1
PIN 1
A7V-VM
A7V-VM Floppy Disk Drive Connector
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A7V-VM User’s Manual
2. HARDWARE SETUP
13) USB Header (12-2 pin HP_USB)
If the USB Ports on the back panels are inadequate, connect an optional USB
connector set to this header and mount it to an open slot on your chassis.
12
1
11
GND
USB Power
USBP–
USBP+
GND
2
2. H/W SETUP
Connectors
GND
USB Power
USBP–
USBP+
GND
HP-USB
A7V-VM
A7V-VM USB Port
14) Internal Audio Connectors (4-pin CD, AUX, MODEM)
These connectors allow you to receive stereo audio input from such sound sources
as a CD-ROM, TV tuner, or MPEG card. The MODEM connector allows the
onboard audio to interface with a voice modem card with a similar connector.
Speaker_out header
speaker out left channel
Ground
speaker out right channel
AUX(White)
A7V-VM Internal Audio Connectors
Left Audio Channel
Ground
Right Audio Channel
A7V-VM
CD_IN (Black)
A7V-VM User’s Manual
Left Audio Channel
Ground
Right Audio Channel
19
2. HARDWARE SETUP
15) ATX Power Supply Connector (20-pin block ATXPWR)
This connector connects to an ATX power supply. The plug from the power supply will only insert in one orientation because of the different hole sizes. Find the
proper orientation and push down firmly making sure that the pins are aligned.
2. H/W SETUP
Connectors
IMPORTANT: Make sure that your ATX power supply (minimum recommended
wattage: 200 watts; 235W for a fully-configured system) can supply at least 20
amperes on the +5-volt lead and at least 10mA (750mA recommended) on the +5volt standby lead (+5VSB). Your system may become unstable/unreliable and may
experience difficulty in powering up if your power supply is inadequate. For WakeOn-LAN support, your ATX power supply must supply at least 750mA +5VSB.
+3.3 Volts
-12.0 Volts
Ground
Power Supply On
Ground
Ground
Ground
-5.0 Volts
+5.0 Volts
+5.0 Volts
A7V-VM
+3.3 Volts
+3.3 Volts
Ground
+5.0 Volts
Ground
+5.0 Volts
Ground
Power Good
+5V Standby
+12.0 Volts
A7V-VM ATX Power Connector
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A7V-VM User’s Manual
2. HARDWARE SETUP
2. H/W SETUP
Connectors
16) System Message LED Lead (2-pin MLED)
This indicates whether a message has been received from a fax/modem. The
LED will remain lit when there is no signal and blink when there is data received. This function requires an ACPI OS and driver support.
17) System Management Interrupt Lead (2-pin SMI)
This allows the user to manually place the system into a suspend mode or “Green”
mode, where system activity is decreased to save electricity and expand the life
of certain components when the system is not in use. This 2-pin connector connects to the case-mounted suspend switch.
18) System Warning Speaker Connector (4-pin SPK)
This 4-pin connector connects to the case-mounted speaker.
19) Reset Switch Lead (2-pin RESET)
This 2-pin connector connects to the case-mounted reset switch for rebooting
your computer without having to turn off your power switch. This is a preferred
method of rebooting to prolong the life of the system’s power supply.
20) System Power LED Lead (3-pin PLED)
This 3-pin connector connects the system power LED, which lights when the
system is powered on and blinks when it is in sleep mode.
21) IDE Activity LED (2-pin IDELED)
This connector supplies power to the cabinet’s IDE activity LED. Read and
write activity by devices connected to the Primary or Secondary IDE connector
will cause the LED to light up.
22) ATX Power Switch Lead (2-pin PWR)
The system power is controlled by a momentary switch connected to this lead.
Pressing the button once will switch the system between ON and SOFT OFF.
Pushing the switch while in the ON mode for more than 4 seconds will turn the
system off. The system power LED shows the status of the system’s power.
A7V-VM
Ground
Speaker
ExtSMI#
Ground
+5V
ATX Power
Switch*
IDELED
PWRLED+
PWRLEDPWRLEDBReset
Ground
PWRBTN
Ground
IDELEDIDELED+
MSGLED+
MSGLED-
SMI Lead
Speaker
Message LED
Connector
Reset SW
Power LED
* Requires an ATX power supply.
A7V-VM System Panel Connectors
A7V-VM User’s Manual
21
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