User guide

BG128128A
Feature
Mechanical Data
Item
Module Dimension
Viewing Area
Dot Size
Dot Pitch
Standard Value Unit
mm
mm
mm
mm
72.4 x 70.0
49.0 x 49.0
0.32 x 0.32
0.35 x 0.35
Dimension
BO LYMIN
1. SMT PCB with metal frame
2. Built-in controller LC7981
3. 1/128 duty cycle
4. +5V single power supply
5. Option: LED, EL B/L
6. Option: negative voltage
Pin Assignment
Pin Symbol Function
1~8
9
10
11
12
13
14
Data bus line
Data/Instruction select
Data read/write
Enable signal
Chip select
Reset signal
DB0-7
RS
R/W
E
/CS
/RST
Vo
15
16
Power supply(GND)
Vdd
Vss
17~18
19
No connection
Power supply for B/L +
NC
A
Contrast adjustment
Power supply(+5V)
20
Power supply for B/L -
NC
Input Voltage
Supply Current
LCD Driving
Voltage
LED Forward
Voltage
LED Forward
Current
Vdd
Idd
Vdd-Vo
Vf
If
Vdd = +5V
Vdd = +5V
25 C
5.0
5.0
17.6
4.2
320
V
mA
V
V
mA
Typical
Value
Electronic Characteristics
o
25 C
o
25 C
o
Item Symbol Condition
Unit
A
D
E
T
A
I
L
A
2
.
5
1
0
.
0
[
l
e
d
]
5
.
0
[
[
e
l
/
r
e
f
]
]
f
f
1
.
6
4
4
7
7
4
9
.
0
²
0
.
2
6
5
.
2
²
0
.
3
6
7
.
4
²
0
.
3
7
2
.
4
²
0
.
5
6
5
.
0
²
0
.
3
7
0
.
0
²
0
.
5
5
9
.
5
²
0
.
3
4
9
.
0
²
0
.
2
4
4
.
7
7
5
.
2
5
1
1
2
.
1
0
1
5
.
0
[
l
e
d
]
1
0
.
0
[
[
e
l
/
r
e
f
]
]
f
f
4
-
2
.
5
3
.
6
2
0
-
1
.
0
Ø
Ø