Full Text Searchable PDF User Manual
Quick Installation Guide
PCM-6890 Installation Guide 1
PCM-6890
Notice:
This guide is designed for experienced users to
setup the system within the shortest time. For
detailed information, please always refer to the
electronic user's manual.
Safety Precautions
PCM-6890
All-in-One Socket 370 Celeron Single Board Computer
with LCD, Ethernet, Audio, & 4 COMs
Part no. 2007689000 1st Ed. Printed in Taiwan May 1999
Quick Installation Guide
Warning!
Always completely disconnect the power cord
from your chassis whenever you work with the
hardware. Do not make connections while the
power is on. Sensitive electronic components
can be damaged by sudden power surges. Only
experienced electronics personnel should open the
PC chassis.
Caution!
Always ground yourself to remove any static
charge before touching the CPU card. Modern
electronic devices are very sensitive to static
electric charges. As a safety precaution, use a
grounding wrist strap at all times. Place all
electronic components in a static-dissipative
surface or static-shielded bag when they are not
in the chassis.
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Locating jumpers
SW1
J5
J9
J8
J10
J1
J2
J7
J6
J3
J4
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Locating connectors
CN1
CN2
U18
CN6
CN8
CN7
CN17
CN13
LED2
CN17
CN15
CN14 CN16
CN9
CN10
CN4
CN11
CN16
CN14
CN12
CN15
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Jumpers and connectors
Connectors on the board link it to external devices such as hard
disk drives, a keyboard, or floppy drives. In addition, the board
has a number of jumpers that allow you to configure your system
to suit your application.
The following tables list the function of each of the board's jumpers
and connectors.
Jumpers
Label
Function
J1
Clear CMOS
J2
System temperature thermal sensor
J3
COM4 RI pin voltage select
J4
COM3 RI pin voltage select
J5
Audio output select
J6
ATX soft-power switch connector
J7
COM2 RS-232/422/485 select
J8
LCD clock select
J9
LCD driving voltage select
J10
COM2 RS-232/422/485 select
SW1 (4~6)
CPU frequency ratio
SW1 (2~3)
DOC address select
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PCM-6890
Connectors
Label
Function
CN1
CPU fan power connector
CN2
PC/104 connector
CN3
USB ports connector
CN4
CD-ROM signal input connector
CN6
IDE drive connector
CN7
Front panel connector
CN8
IrDA connector
CN9
ATX power connector
CN10
LCD display connector
CN11
Keyboard and PS/2 mouse connector
CN12
VGA display connector
CN13
Audio connector
CN14
Printer port connector
CN15
100Base-Tx Ethernet connector
CN16
Serial ports connector
CN17
Floppy dirve connector
U18
DiskOnChip socket
LED2
Ethernet Tx/Rx/Link LED connector
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COM3/COM4 RI pin voltage select
(J3, J4)
The 9th pin of COM3 and COM4 (9-pin D-sub connector) can be
selected as RI, +5V, or +12V by setting J3 & J4.
COM3 RI pin setting (J4)
RI*
+5V
+12V
J4
COM4 RI pin setting (J3)
RI *
+5V
+12V
J3
*default
Clear CMOS (J1)
You can use J1 to clear the CMOS data if necessary. To reset the
CMOS data, set J4 to 2-3 closed for just a few seconds, and then
move the jumper back to 1-2 closed.
Clear CMOS (J1)
Protect*
Clear CMOS
J1
*default
1
2
3
1
2
3
1 3 5
2 4 6
1 3 5
2 4 6
1 3 5
2 4 6
1 3 5
2 4 6
1 3 5
2 4 6
1 3 5
2 4 6
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ATX Soft-Power Switch connector
(J6)
The ATX Soft-Power switch connector is a 2-pin header. Locate
the power switch cable from your system. It is a 2-pin female
connector. Plug this connector to the Soft-Power switch connector
marketed J6.
Audio output select (J5)
You can select the output mode of onboard audio connector
(CN14) by setting J5.
"Speaker out" is the output signal amplified by onboard amplifier
Audio output select (J5)
Line out *
Speaker out
J5
*default
2 1
4 3
6 5
2 1
4 3
6 5
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COM2 RS-232/422/485 select (J10, J7)
The PCM-6890 COM2 serial port can be selected as RS-232, RS-422,
or RS-485 by setting J10 & J7.
COM2 Select (J10, J7)
RS-232* RS-422
RS-485
J10
J7
*default
1 4 7 10
3 6 9 12
1 4 7 10
3 6 9 12
1 4 7 10
3 6 9 12
1 3 5
2 4 6
1 3 5
2 4 6
1 3 5
2 4 6
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PCM-6890
J8
LCD clock signal select (J8)
You can select the LCD control signal by setting J8. The following
charts show the available option.
LCD clock signal select (J8)
SHF CLK *
ASHF CLK
*default
1 2 3
1 2 3
J9
LCD driving voltage select (J9)
You can select the LCD connector CN10 (pin 5 and pin 6) driving
voltage by setting J9. The configurations are as follows:
LCD driving voltage select (J9)
5V
3.3V *
*default
1 2 3
1 2 3
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SW1 (4~6) CPU frequency ratio
CPU core frequency = CPU frequency ratio (2~5.5) * External bus
clock (66 or 100 MHz)
U
P
C
Y
C
N
E
U
Q
E
R
F
O
I
T
A
R
)
4
(
1
W
S
)
5
(
1
W
S
)
6
(
1
W
S
X
2
N
O
F
F
O
F
F
O
X
5
.
2
N
O
F
F
O
N
O
X
3
N
O
N
O
F
F
O
X
5
.
3
N
O
N
O
N
O
X
4
F
F
O
F
F
O
F
F
O
X
5
.
4
F
F
O
F
F
O
N
O
X
5
F
F
O
N
O
F
F
O
X
5
.
5
F
F
O
N
O
N
O
*
*
default
Note:
Most Celeron CPUs' frequency ratio are pre-locked
within the CPUs. These CPUs run at fixed speed
(frequency) regardless of the configurations listed above.
If the CPU you are using requires higher ratio then 5.5X, it
is most likely pre-locked.
Quick Installation Guide
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PCM-6890
SW1 (2~3) DOC address select
The DiskOnChip 2000 occupies an 8 Kbyte window in the upper
memory address range of D400 to E000. You should ensure this
does not conflict with any other device's memory address. J7
controls the memory address of the Flash disk.
These addresses might conflict with the ROM BIOS of other
peripheral boards. Please select the appropriate memory address
to avoid memory conflicts.
C
O
D
S
S
E
R
D
D
A
)
2
(
1
W
S
)
3
(
1
W
S
0
0
4
D
F
F
O
F
F
O
0
0
8
D
N
O
F
F
O
0
0
C
D
F
F
O
N
O
E
L
B
A
S
I
D
N
O
N
O
*
*
default
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