HP Pavilion PCs - About the ASUS A7V-VM Motherboard

In this document:

Introduction

This document gives details on the ASUS A7V-VM motherboard. The features of this motherboard are:

The motherboard information in this document applies to the following HP Pavilion PC model:

HP Pavilion 8776C

Motherboard layout

Figure 1: A7V-VM Motherboard layout

Jumper locations and functions

There are no jumper blocks on this motherboard.

Central Processing Unit (CPU)

The motherboard provides a ZIF Socket A.

Figure 2: A7V-VM Socket A

1- Blank
2- Lever
3- Lock

Figure 3: AMD Athlon

1- Notch

System Memory (DIMM)

This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are available for 3.3 volt (power level) unbuffered Synchronous Dynamic Random Access Memory (SDRAM) of 16, 32, 64, 128, 256, or 512 MB to form a memory size between 16 MB and 1 GB. 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).

The DIMMs must be 3.3 V Unbuffered for this motherboard. To determine the DIMM type, check the notches on the DIMMs.

Figure 4: 168-Pin DIMM Notch Key Definitions (3.3 V)

1- DRAM Key Position
2- Voltage Key Position
3- RFU
4- Buffered
5- Unbuffered
6- 5.0V
7- 3.3V
8- Reserved

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.

System memory configuration chart

SDRAM in Bank 0

SDRAM in Bank 1

Total System Memory

Empty

16 MB

16 MB

Empty

32 MB

32 MB

Empty

64 MB

64 MB

Empty

128 MB

128 MB

16 MB

Empty

16 MB

16 MB

16 MB

32 MB

16 MB

32 MB

48 MB

16 MB

64 MB

80 MB

16 MB

128 MB

144 MB

32 MB

Empty

32 MB

32 MB

16 MB

48 MB

32 MB

32 MB

64 MB

32 MB

64 MB

96 MB

32 MB

128 MB

160 MB

64 MB

Empty

64 MB

64 MB

16 MB

80 MB

64 MB

32 MB

96 MB

64 MB

64 MB

128 MB

64 MB

128 MB

192 MB

128 MB

Empty

128 MB

128 MB

16 MB

144 MB

128 MB

32 MB

160 MB

128 MB

64 MB

192 MB

128 MB

128 MB

256 MB

256 MB

Empty

256 MB

256 MB

256 MB

512 MB

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.

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.

Audio port connectors (three 1/8 inch 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.

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.

Pin

Signal Name

1

Data

2

No Connect

3

Ground

4

+5 Vcc (fused)

5

Clock

6

No Connect

USB Connectors (USB 1 and USB 2)

Two USB ports are available for connecting USB devices.

Pin

Signal Name

1

Power

2

USBP0# (USBP1#)

3

USBP0 (USBP1)

4

Ground

Serial Port Connector(9-pin COM1, 10-1 pin COM2)

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.

Pin

Signal Name

1

Data Carrier Detect (DCD)

2

Receive Data (RXD)

3

Transmit Data (TXD)

4

Data Terminal Ready (DTR)

5

Ground

6

Data Set Ready (DSR)

7

Request to Send (RTS)

8

Clear to Send (CTS)

9

Ring indicator

Parallel port connector (25-pin printer)

You can enable the parallel port and choose the IRQ through Onboard Parallel Port in the BIOS.

Signal Name

Pin

Pin

Signal Name

STROBE-

1

14

AUTO FEED

Data Bit 0

2

15

ERROR*

Data Bit 1

3

16

INIT*

Data Bit 2

4

17

SELECT IN*

Data Bit 3

5

18

Ground

Data Bit 4

6

19

Ground

Data Bit 5

7

20

Ground

Data Bit 6

8

21

Ground

Data Bit 7

9

22

Ground

ACK*

10

23

Ground

BUSY

11

24

Ground

Error

12

25

Ground

SELECT

13

   

IDE Connectors

Signal Name

Pin

Pin

Signal Name

Reset IDE

1

2

Ground

Host Data 7

3

4

Host Data 8

Host Data 6

5

6

Host Data 9

Host Data 5

7

8

Host Data 10

Host Data 4

9

10

Host Data 11

Host Data 3

11

12

Host Data 12

Host Data 2

13

14

Host Data 13

Host Data 1

15

16

Host Data 14

Host Data 0

17

18

Host Data 15

Ground

19

20

Key

DDRQ0(DDRQ1)

21

22

Ground

I/O Write

23

24

Ground

I/O Read

25

26

Ground

IORDY

27

28

Vcc pull-up

DDACK0(DDACK1)

29

30

Ground

IRQ14(IRQ15)

31

32

Reserved

Addr 1

33

34

Reserved

Addr 0

35

32

Addr 2

Chip Select 1P(1S)

37

38

Chip Select 3P (3S)

Activity

39

40

Ground

Floppy Connector

Signal Name

Pin

Pin

Signal Name

Ground

1

2

DENSEL

Ground

3

4

Reserved

Key

5

6

FDEDIN

Ground

7

8

Index

Ground

9

10

Motor Enable A

Ground

11

12

Drive Select B

Ground

13

14

Drive Select A

Ground

15

16

Motor Enable B

MSEN1

17

18

DIR

Ground

19

20

STEP

Ground

21

22

Write Data

Ground

23

24

Write Enable

Ground

25

26

Track 00

MSEN0

27

28

Write Protect

Ground

29

30

Read Data

Ground

31

32

Side 1 Select

Ground

33

34

Diskette Change

Wake On LAN Connector

Pin

Signal Name

1

+5 V Standby

2

Ground

3

PME

Stereo Audio In Connector (cd_in)

Modem Input connector

ATX Power Connector

Pin

Signal Name

Pin

Signal Name

1

+3.3 V

11

+3.3 V

2

+3.3 V

12

-12 V

3

Ground

13

Ground

4

+5 V

14

PW_ON

5

Ground

15

Ground

6

+5 V

16

Ground

7

Ground

17

Ground

8

PWRGD (Power Good)

18

-5 V

9

+5 VSB (Standby for real-time clock)

19

+5 V

10

+12 V

20

+5 V

CPU Fan Connector

Pin

Signal Name

1

Ground

2

+12 V (suspend)

3

Ground

Chassis Fan Connector

Pin

Signal Name

1

Ground

2

+12 V

3

Rotation

System Fan Connector

Pin

Signal Name

1

Ground

2

+12 V

3

Rotation

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Software and Drivers

Copyright (C) Hewlett-Packard Co. 2000
This information is subject to change without notice and
is provided "as is" with no warranty.
Hewlett-Packard shall not be liable for any direct,
indirect, special, incidental or consequential damages
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