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ViewSonic VG181 - Page 13

ViewSonic VG181
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ViewSonic
Service
Manual
July
2000
-
Version
1.0
VG181
THEORY
OF
CIRCUIT
OPERATION
The
function
block
and
parameters
of
ICS501
are
as
follows
:
VDD
GND
PLL
Clock
Muitiplier
Circuitry
Crystal
or
clock
input
Output
Buffer
Crystal
Dscillatoy
Output
Enable
a
a
<a
oo
|
oo
|
axinput
|
M__|
5.3125x
input
1
oso
|
ae
eae
a
mM
|
of
625xinput
pm}
Mf
xin
pm
|
tf
8
t25X
input
1
|
od
exinput
pa
|
sxinput
a
eel
0
:
direct
connected
to
GND
1
:
direct
connected
to
VCC
M
:
leave
unconnected
(floating)
Page
11
Confidential
-
Do
Not
Copy

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