ViewSonic VP150M Service Manual - Page 34

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ViewSonic September 2000 - Version 1.0 THEORY OF CIRCUIT OPERATION Service Manual VP150m Symbol GND B_IN00 B_IN01 B_IN02 VDD B_IN03 B_INO4 B_IN05 B_INO6 B_IN07 GND HSYNC_I VSYNC_I DE_IN VDD Pin Number 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 I/O Description Ground I Channel A Data Input Color Blue (LSB) I Channel A Data Input Color Blue I Channel A Data Input Color Blue Power Supply I Channel A Data Input Color Blue I Channel A Data Input Color Blue I Channel A Data Input Color Blue I Channel A Data Input Color Blue I Channel A Data Input Color Blue (MSB) Ground I Input HSYNC (any polarity) 1 Input VSYNC (any polarity) 1 DE input for digital interface Power Supply Functional Description The AM101-1 has the following major function block: 1. Input mode detection and auto calibration block 2. Buffer memory and read/write control block 3. Image scaling, interpolation and dithering block 4. OSD mixer and LCD interface block 5. EEPROM interface block 6. CPU interface block Functional Block Diagram ADC Phase Control lope PLL Input Model Detection Auto Calibration Buller Memory Scaling Interpolation Dithering Write Control Reed Control mOiSneD, CPU Interface PR OM Into face CPU Output PLL E2ROM TFT LCD Monitor Confidential - Do Not Copy Page 33

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ViewSonic
September
2000
-
Version
1.0
Service
Manual
VP150m
THEORY
OF
CIRCUIT
OPERATION
Symbol
Pin
Number
I/O
Description
GND
146
Ground
B_IN00
147
I
Channel
A
Data
Input
Color
Blue
(LSB)
B_IN01
148
I
Channel
A
Data
Input
Color
Blue
B_IN02
149
I
Channel
A
Data
Input
Color
Blue
VDD
150
Power
Supply
B_IN03
151
I
Channel
A
Data
Input
Color
Blue
B_INO4
152
I
Channel
A
Data
Input
Color
Blue
B_IN05
153
I
Channel
A
Data
Input
Color
Blue
B_INO6
154
I
Channel
A
Data
Input
Color
Blue
B_IN07
155
I
Channel
A
Data
Input
Color
Blue
(MSB)
GND
156
Ground
HSYNC_I
157
I
Input
HSYNC
(any
polarity)
VSYNC_I
158
1
Input
VSYNC
(any
polarity)
DE_IN
159
1
DE
input
for
digital
interface
VDD
160
Power
Supply
Functional
Description
The
AM101-1
has
the
following
major
function
block:
1.
Input
mode
detection
and
auto
calibration
block
2.
Buffer
memory
and
read/write
control
block
3.
Image
scaling,
interpolation
and
dithering
block
4.
OSD
mixer
and
LCD
interface
block
5.
EEPROM
interface
block
6.
CPU
interface
block
Functional
Block
Diagram
ADC
Phase
Control
lope
PLL
Input
Model
Detection
Auto
Calibration
Buller
Memory
Write
Control
CPU
Interface
Reed
Control
Scaling
Interpolation
Dithering
PR
OM
Into
face
TFT
LCD
m
O
i
S
ne
D
,
Monitor
CPU
Output
E2ROM
PLL
Confidential
—
Do
Not
Copy
Page
33