ViewSonic VG150B Service Manual - Page 28

MTV112E, functions, below

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ViewSonic April 1999 - Version 1.0 THEORY OF CIRCUIT OPERATION Service Manual VG150 The MTV112E pin functions are list below PIN# 1 2 3 4 5 6 7 8 9 10 11 12 Name P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6/ADD P1.7/AD1 RST HSCL HSDA ISDA 13 HSYNC 14 ISCL 15 VSYNC 16 HBK/P4.1 17 VBK/P4.0 18 X2 19 X1 20 VSS 21 P2.0/INTO 22 P2.1 23 P2.2 24 P2.3 25 D13/P2.4 TYPE Description I/O SDA of I2C for communication with ICS1523 O SCL of I2C for communication with ICS1523 O Power switch of +5V and VLCD O Fine tune function select O H-Sync polarity O V-Sync polarity O Inverter enable O AM100 Rest signal I MPU Rest signal N.C. N.C. I/O SDA of PC for communication with 24C08, MTV118, M52473 I H-Sync input O SCL of I2C for communication with 24C08, MTV118, M52473 I V-Sync output N.C. O Separated V-Sync signal from composite sync O Oscillator output I Oscillator input - Negative Power Supply - Reserve I/O SDA of I2C for communication with AM100 I/O SCL of I2C for communication with AM100 - Reserve I `+" key Page 25 ic-6ifffaffINTriif.Aror_q?kii

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ViewSonic
April
1999
-
Version
1.0
Service
Manual
VG150
THEORY
OF
CIRCUIT
OPERATION
The
MTV112E
pin
functions
are
list
below
PIN#
Name
TYPE
Description
1
P1.0
I/O
SDA
of
I
2
C
for
communication
with
ICS1523
2
P1.1
O
SCL
of
I
2
C
for
communication
with
ICS1523
3
P1.2
O
Power
switch
of
+5V
and
VLCD
4
P1.3
O
Fine
tune
function
select
5
P1.4
O
H
-Sync
polarity
6
P1.5
O
V
-Sync
polarity
7
P1.6/ADD
O
Inverter
enable
8
P1.7/AD1
O
AM100
Rest
signal
9
RST
I
MPU
Rest
signal
10
HSCL
N.C.
11
HSDA
N.C.
12
ISDA
I/O
SDA
of
PC
for
communication
with
24C08,
MTV118,
M52473
13
HSYNC
I
H
-Sync
input
14
ISCL
O
SCL
of
I
2
C
for
communication
with
24C08,
MTV118,
M52473
15
VSYNC
I
V
-Sync
output
16
HBK/P4.1
N.C.
17
VBK/P4.0
O
Separated
V
-Sync
signal
from
composite
sync
18
X2
O
Oscillator
output
19
X1
I
Oscillator
input
20
VSS
-
Negative
Power
Supply
21
P2.0/INTO
-
Reserve
22
P2.1
I/O
SDA
of
I
2
C
for
communication
with
AM100
23
P2.2
I/O
SCL
of
I
2
C
for
communication
with
AM100
24
P2.3
-
Reserve
25
D13/P2.4
I
`+"
key
Page
25
ic-6ifffaffINTriif.Aror_q?kii