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127
GND
128
LVBOP
7.4 U105 (Micro-controller: W78E65P-40)
Pin
Symbol
1
P4.2/INT3
2
P1,0/T2
3
P1.1/T2EX
4
P1.2
5
P1.3/PWM0
6
P1.4/PWM1
7
P1.5/PWM2
8
P1.6/PWM3
9
P1.7/PWM4
10
RST
11
P3.0/RXD
12
P4.3/INT2
13
P3.1/TXD
14
P3.2/INT0
15
P3.3/INT1
16
P3.4/T0
17
P3.5/T1
18
P3.6/WR
19
P3.7/RD
20
XTAL2
21
XTAL1
22
GND
23
P4.0
24
P2.0/A8
25
P2.1/A9
26
P2.2/A10
27
P2.3/A11
28
P2.4/A12
29
P2.5/A13
30
P2.6/A14
31
P2.7/A15
32
PSEN
33
ALE
34
P4.1
35
EA
36
P0.7/AD7
37
P0.6/AD6
38
P0.5/AD5
39
P0.4/AD4
40
P0.3/AD3
41
P0.2/AD2
42
P0.1/AD1
43
P0.0/AD0
44
+5V
ViewSonic Corporation
Ground
B-Link Positive LVDS Differential Data
O
I/O
A bi-directional I/O port with alternate function.
O
Enable panel power on
O
Enable CCFL work
I
VGA cable detection
O
provide alternated function of PWM Volume
provide alternated function of PWM Green LED
O
lighting control
provide alternated function of PWM Orange LED
O
lighting control
Function is the same as that of standard 8052
Function is the same as that of standard 8052
I
Reset control pin
SCL line of I2C for EDID, debug function
PORT 4: A bi-directional I/O port with alternate
function.
SDA line of I2C for EDID, debug function
I
Interrupt request control pin
O
Shut Down Volume Mute standard 8052.
O
SCL line of I2C communication with EEPROM
I/O
SDA line of I2C communication with EEPROM
I
DVI cable detection standard 8052.
EEPROM write protection control for DVI EDID
O
Prevent E2PROM Write in standard 8052.
Crystal 22.1184MHz In
Crystal 22.1184MHz out
Sink voltage ground
A bi-directional I/O port with alternate function.
DC power on/off control
OSD "►" control to adjust value to increase
OSD "◄" control to adjust value to decrease
Selection of menu command listed
OSD page selection
Auto adjustment control
A bi-directional I/O port with internal pull-ups
A bi-directional I/O port with internal pull-ups
Program Store Enable
Address Latch Enable
A bi-directional I/O port with alternate function
External Access Enable external ROM. The ROM
address and data will not be presented on the bus if
I
the EA pin is high and the program counter is
within the 64 KB area.
I/O
DDR Direct Bus Communication with Scaler
I/O
DDR Direct Bus Communication with Scaler
I/O
DDR Direct Bus Communication with Scaler
I/O
DDR Direct Bus Communication with Scaler
I/O
WRZ line of DDR Direct Bus
I/O
RDZ line of DDR Direct Bus
I/O
ALE line of DDR Direct Bus
O
Hardware reset to Scaler
I
+5V for MCU working voltage
Confidential - Do Not Copy
26
Description
VA702-1_VA702b-1
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