GDM240128A Datasheet, PDF (8/29 Pages) List of Unclassifed Manufacturers – LCD MODULE

User’s Manual
5. I/O terminals
Note: The following explanation is applied for the module without built-in voltage
converter.
5-1. I/O Connection
Pin No,
1
2
3
4
5
6
7~14
15
16
17
18
19
20
Symbol
VSS
VDD
V0
C/D
RD
WR
D0~D7
CE
RES
VEE
MD2
FS
LED+
Function
Signal ground(GND)
power supply for logic(+5V)
Contrast adjustment
H/L Register select signal
Data read (Active at “L”)
Data write (Active at”L”)
Data Bus(D0=LSB,D7=MSB)
Data read (Active at “L”)
Reset signal
Power supply for LCD drive
H=32,L=40
Font Select: Connected to Vdd: 6×8 dots font
Connected to Vss: 8×8 dots font
Power supply for backlight
5-2．Signal Timing Diagram:
Item
Symbol
Condition
Min. Max. Unit
C/D set-up time
tcds
100
—
C/D hold time
tcdh
10
—
CE,RD,WR pulse width tcp,trp,twp Vdd=5V±5%
80
—
Data set-up time
Data hold time
tds
Vss=0V
80
—
ns
tdh
Ta=25℃
40
—
Access time
tacc
—
150
Output hold time
toh
10
50
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