PROCESSOR INTERFACING
8051 CPU
RD
WR
E
LCD MODULE
6800 CPU
VmA
∅2
E
LCD MODULE
A15
A14
A13
ADDRESS
DECODER
A15
A14
A13
ADDRESS
DECODER
ALE
AD0
AD7
ADDRESS
LATCH
A0
A1
R/S
R/W
D0
D7
R/W
D0
D7
A0
R/W
D0
D7
R/S
TIMING CHARACTERISTICS
ITEM
ENABLE CYCLE TIME
ENABLE PULSE WIDTH
ENABLE RISE/FALL TIME
RS, R/W SET UP TIME
DATA DELAY TIME
DATA SETUP TIME
HOLD TIME
SYMBOL
T
CYC
P
W
T
ER
, T
EF
T
AS
T
DDR
T
DSW
T
H
360
20
MAX.
MIN.
UNIT
500 nS
230 nS
nS
40 nS
nS
60 nS
10 nS
POWER SUPPLY EXAMPLES
V
DD
+5V
10-20K
V
L
V
DD
+5V
10-20K
V
L
LCD
MODULE
V
SS
LCD
MODULE
-5V
V
SS
SINGLE POWER
DUAL POWER
DATA READ
RS
2.2V
0.6V
2.2V
0.6V
DATA WRITE
RS
T
H
T
AS
2.2V
2.2V
0.6V
2.2V
0.6V
T
AS
R/W
2.2V
T
H
R/W
0.6V
0.6V
T
H
P
W
E
0.6V
2.2V
2.2V
T
H
P
W
E
0.6V
2.2V
2.2V
T
EF
0.6V
T
EF
0.6V
T
ER
T
DDR
D
0
-D
7
2.2V
0.6V
T
ER
T
H
VALID DATA
T
CYC
2.2V
0.6V
T
DDR
D
0
-D
7
2.2V
0.6V
T
DSW
VALID DATA
T
CYC
T
H
2.2V
0.6V
HANDLING LCD’S & LCD MODULES
CLEANING
l
Wipe gently with cotton or soft material soaked in petroleum
benzine.
l
Do not use acetone, toluene, ethanol or isopropyl alcohol.
l
Contact with water for a long period of time may damage the
display.
HANDLING
l
Do not touch display area with bare hands.
l
Do not touch exposed polarizer with hard objects.
l
Do not expose the CMOS IC’s to static electricity.
l
Avoid exposing the module to excessive shock or pres-
sure.
l
Do not allow the storage temperature to exceed the
specified range.
SAFETY
l
The toxicity of liquid crystal fluid is very low, but wash it off
immediately with soap and water if fluid touches the skin or
clothing.
Page 46
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