EasyManua.ls Logo

ViewSonic VG181 - Page 18

ViewSonic VG181
72 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Loading...
Service
Manual
ViewSonic
VG181
July
2000
-
Version
1.0
THEORY
OF
CIRCUIT
OPERATION
The
three
ports
are
configured
as
shown
below:
porta
|x
|
|
PPORTAS.
[xe
|
PorTAS
|LcDPWON
|
ouput
Portas
|x
|
PORTA7
|
CLKEN
Output
MCKEXT
Power
on
of
digital
port
Digital
port
output
enable
Ipornta2
|ADCOE
{Output
Analog
port
output
enable
Analog
port
sync.
enable
lporTas
[scot
[input
_|
Digital
sync.
detect
Iporntss
|PwaD
{output
Power
on
of
analog
port
pores
|x
|
ae
i
input
Panel
Enable
Voltage
control
of
power
saving
m
b>)
>
S
ro}
Q
Oo
QO
g
»
3
a
=.
a
>
>
©
Q
c
0)
=]
°
<
Q
Q
}
x
°
So
Input
Key
detection
Key
detection
Key
detection
Key
detection
PORTC4
|
PORTC4
LED
LED
PORTC7
|X
Page
16
Confidentiat
-
Do
Not
Copy

Table of Contents

Related product manuals