LM240120BCW-3
LCD Module User Manual
Prepared by:
Checked by:
Approved by:
Huchubin
Date: 2021-01-05
Date:
Date:
Rev.
Descriptions
Release Date
0.1
Preliminary release
2021-01-05
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LM240120BCW-3
Table of Content
1. Basic Specifications .............................................................................................................. 3
1.1
Display Specifications ............................................................................................................................................ 3
1.2
Mechanical Specifications ...................................................................................................................................... 3
1.3
Block Diagram ........................................................................................................................................................ 3
1.4
Terminal Functions ................................................................................................................................................. 4
2.
Absolute Maximum Ratings .................................................................................................. 5
3. Electrical Characteristics ...................................................................................................... 5
3.1
DC Characteristics ................................................................................................................................................. 5
3.2
LED Backlight Circuit Characteristics ..................................................................................................................... 5
3.3
AC Characteristics ................................................................................................................................................. 6
4. Function specifications ......................................................................................................... 7
4.1
Resetting the LCD module ..................................................................................................................................... 7
4.2
Display Commands ................................................................................................................................................ 8
5. Design and Handling Precaution ........................................................................................ 10
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1. Basic Specifications
1.1
Display Specifications
1) LCD Display Mode
: FSTN, Positive, Transflective
2) Display Color
: Display Data = “1” : Dark Gray (*1)
: Display Data = “0” : Light Gray (*2)
3) Viewing Angle
: 12H
4) Driving Method
: 1/128 duty, 1/12 bias
5) Backlight
: White LED backlight
Note:
*1. Color tone may slightly change by Temperature and Driving Condition.
*2. The Color is defined as the inactive / background color
1.2
Mechanical Specifications
1) Outline Dimension
: 84.0 x 50.0 x 8.7MAX (mm)
(See attached Outline Drawing for details)
1.3
Block Diagram
BLA
Backlight Circuit
LCD Panel
240¡Á120Pixels
VDD
VSS
DB0~DB7
UC1608 or equivalent
CS, /RST, D/C, /WR, /RD
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1.4
Terminal Functions
PIN
Pin No.
Name
I/O
Descriptions
1
VSS
Supply Negative power supply,0V
2
VDD
Supply Positive power supply
3
DB7
I/O
8-bit Data bus;
:
:
Three state I/O terminal for display data or instruction data
10
when /CS=H,
DB0
D0~D7=High Impedance
11
/RD
Input
/WR=H, /RD=L;
Data or Status read form the LCD module
12
/WR
Input
/WR=L à H, /RD=H;
Data or Instruction latch into the LCD module
13
Input
Register Select
D/C
D/C = H, Transferring the Display Data
D/C = L, Transferring the Control Data
14
Input
Reset signal
/RST
/RST = L, Initialization is executed
/RST = H, Normal running.
15
Input
Chip Select
CS
CS=H, enable access to the LCD module
CS=L, disable access to the LCD module
16
BLA
Supply Positive power for LED backlight
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2. Absolute Maximum Ratings
Items
Symbol
Min.
Max.
Unit Condition
Supply Voltage
V DD
-0.3
+3.6
V
V SS = 0V
Input Voltage
V IN
-0.3
V DD +0.3
V
V SS = 0V
Operating Temperature
T OP
-40
+70
° C
No Condensation
Storage Temperature
T ST
-40
+80
° C
No Condensation
Cautions:
Any Stresses exceeding the Absolute Maximum Ratings may cause substantial damage to the device. Functional
operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure
to extreme conditions may affect device reliability.
3. Electrical Characteristics
3.1
DC Characteristics
V SS =0V, V DD =3.0V, T OP =25 ° C
Items
Symbol
MIN.
TYP.
MAX.
Unit
Condition /
Application Pin
Operating Voltage
V DD
2.7
3.0
3.3
V
VDD
Input High Voltage
V IH
0.8xV DD
-
V DD
V
/RST, CS, D/C,
Input Low Voltage
V IL
V SS
-
0.2xV DD
V
DB0~DB7, /RD, WR
Operating Current
I DD
-
1.0
2.5
mA
VDD
3.2
LED Backlight Circuit Characteristics
VSS=0V, If BLA =85mA, T OP =25 ° C
Items
Symbol
MIN.
TYP.
MAX.
Unit
Applicable Pin
Forward Voltage
Vf BLA
-
3.3
-
V
BLA
Forward Current
If BLA
-
85
100
mA
BLA
Cautions:
Exceeding the recommended driving current could cause substantial damage to the backlight and shorten its lifetime.
BLA
VSS
No. of LED = 5pcs
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3.3
AC Characteristics
3.3.1 8080 Mode System Bus Timing
V SS =0V, V DD =3.0V, T OP =25 ° C
Item
Symbol
MIN.
TYP.
MAX.
Unit
Address setup time (D/C)
tas80
5
-
-
ns
Address hold time (D/C)
tah80
25
-
-
ns
System cycle time
tcy80
175
-
-
ns
Read pulse width
tpwr80
82
-
-
ns
Write pulse width
tpww80
44
-
-
ns
High pulse width (read)
thpw80
82
-
-
ns
High pulse width (write)
thpw80
44
-
-
ns
Data setup time
tds80
38
-
-
ns
Data hold time
tdh80
25
-
-
ns
Data access time
tacc80
-
-
75
ns
Data output disable time
tod80
9
-
25
ns
Chip select setup time
tcssa80
13
-
-
ns
Chip select setup time
tssd80
13
-
-
ts
Chip select setup time
tcsh80
25
-
-
ns
Note:
*1. Input signal rise/fall time should be less than 15ns .
*2. CL=100pF
*3.All timing is using 20% and 80% of VDD as the reference.
3.3.2 Reset Timing
V SS =0V, V DD =3.0V, T OP =25 ° C
Item
Symbol
MIN.
TYP.
MAX.
Unit
Reset LOW pulse width
trw
1.3
-
-
μs
Note:
*1.All timing is using 20% and 80% of VDD as the reference.
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4. Function specifications
4.1
Resetting the LCD module
The LCD module should be initialized by using /RST terminal.
While turning on the VDD and VSS power supply, maintain /RST terminal at LOW level. After the
power supply stabilized, release the reset terminal (/RST=HIGH)
4.1.1 Display Memory Map
Page address
data
LCD Display (front view)
D0
0
:
D7
D0
1
:
D7
D0
2
:
D7
D0
:
:
D7
:
D0
240x120 pixels
:
D7
D0
12
:
D7
D0
13
:
D7
D0
14
:
D7
Column Address
00h
à
EFh
Note:
*1. MUX Rate, MR=1 (1/128duty)
*2. Start Line, SL[5:0]=000000
*3. Fixed Line, FL[3:0]=0000
*4. SEG mirror, MX=1 (mirror X direction)
*5. COM mirror, MY=0 (normal Y direction)
*6. MSB First Mapping, MSF=0
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4.2
Display Commands
The LCD module contains register, which control the operation. These register can be modified by commands.
The following table is a summary of the control registers, their meaning and their default value.
4.2.1 Register Table
Note: Please refer to UC1608 data sheet for details
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4.2.2 Command Table
The following is the list of host command supported.
Note:
Please refer to UC1608 data sheet for details
R/W=0 means it is a write function, R/W=1 means it is a read function
D/C=0 means it is a control data, D/C=1 means it is a display data
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5. Design and Handling Precaution
1.
The LCD panel is made by glass. Any mechanical shock (eg. dropping form high place)
will damage the LCD module.
2.
Do not add excessive force on the surface of the display, which may cause the Display
color change abnormally.
3.
The polarizer on the LCD is easily get scratched. If possible, do not remove the LCD
protective film until the last step of installation.
4.
Never attempt to disassemble or rework the LCD module.
5.
Only Clean the LCD with Isopropyl Alcohol or Ethyl Alcohol. Other solvents (eg. water)
may damage the LCD.
6.
When mounting the LCD module, make sure that it is free form twisting, warping and
distortion.
7.
Ensure to provide enough space (with cushion) between case and LCD panel to prevent
external force adding on it, or it may cause damage to the LCD or degrade the display
result.
8.
Only hold the LCD module by its side. Never hold LCD module by add force on the heat
seal or TAB.
9.
Never add force to component of the LCD module. It may cause invisible damage or
degrade of the reliability.
10.
LCD module could be easily damaged by static electricity. Be careful to maintain an
optimum anti-static work environment to protect the LCD module.
11.
When peeling off the protective film from LCD, static charge may cause abnormal
display pattern. It is normal and will resume to normal in a short while.
12.
Take care and prevent get hurt by the LCD panel sharp edge.
13.
Never operate the LCD module exceed the absolute maximum ratings.
14.
Keep the signal line as short as possible to prevent noisy signal applying to LCD module.
15.
Never apply signal to the LCD module without power supply.
16.
IC chip (eg. TAB or COG) is sensitive to the light. Strong lighting environment could
possibly cause malfunction. Light sealing structure casing is recommend.
17.
LCD module reliability may be reduced by temperature shock.
18.
When storing the LCD module, avoid exposure to the direct sunlight, high humidity, high
temperature or low temperature. They may damage or degrade the LCD module
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