2.2 Interface Pin Description
Pin No.
1
2
3
Symbol
V
SS
V
DD
V
O
Signal Description
Power Supply (Vss=0)
Power Supply (V
DD
>V
SS
)
Operating voltage for LCD
Register Selection input
High = Data register
Low = Instruction register (for write)
Busy flag address counter (for read)
Read/Write signal input is used to select the read/write
5
6
7~10
R/W
E
DB0 ~ DB3
mode
High = Read mode, Low = Write mode
Start enable signal to read or write the data
Four low order bi-directional three-state data bus lines. Use
for data transfer between the MPU and the LCD module.
These four are not used during 4-bit operation.
Four high order bi-directional three-state data bus lines.
Used for data transfer between the MPU and the LCD
11~14
DB4~DB7
module.
DB7 can be used as a busy flag.
Power supply for LED B/L (+)
Power supply for LED B/L (-)
4
RS
15
16
Contrast Adjust
A
K
V
DD
2
V
O
10~20KΩ
Vss
1
1
15
16
LCD MODULE
3
4.2V
PS2002LRS-AWA-B-01
Rev.0(DK)
Page9
POWERTIP [ POWERTIP TECHNOLOGY ]
