TOPWAY LMT032DNAFWD LCD Module User Manual

: August 6, 2024
: Topway

Table of Contents

TOPWAY LMT032DNAFWD LCD Module
Specifications
FAQs
Descriptions
General Specification
Block Diagram
Terminal Functions
Electrical Characteristics
AC Characteristics
Optical Characteristics
Handling Precautions
Warranty
DIMENSION
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TOPWAY LMT032DNAFWD LCD Module

Specifications

Screen Size(Diagonal): 3.2″
Active Area: 64.8 x 48.6 (mm)
Number of dots: 320 x 240 (RGB)
Pixel Pitch: 0.2025 x 0.2025 (mm)
Color Depth: 16.7M colors
Display Technology: TFT Panel
Display Mode: RGB
Display Interface: ILI9341 or equivalent
Viewing Direction: TBD
Surface Treatment: TBD
Operating Temperature: TBD
Storage Temperature: TBD

FAQs

Q: What is the screen size of the LCD module?
- A: The screen size is 3.2 inches diagonally.
Q: What is the resolution of the display?
- A: The display has a resolution of 320×240 pixels (RGB).

Descriptions

Rev.	Descriptions	Edit	Release Date
0.1	Preliminary	Yang	2012-12-17
0.2	Typing Correction Block Diagram	Yang	2013-01-15
0.3	Update General Specification	Yang	2013-03-07
0.4	Add Backlight Function	Lin	2013-05-31
0.5	Update Viewing Direction	Li Keke	2019-12-31
0.6	Update 1. General Specification、BLEN Descriptions of 3.1 Interface、5.1 DC

Characteristics、 8. Optical Characteristics 、9.LCD Module Design and Handling Precautions and Outline| Caiwei| 2024-03-05

General Specification

Screen Size(Diagonal): 3.2”
Active Area: 64.8 x 48.6 (mm)
Number of dots: 320 x 240(RGB)
Pixel Pitch： 0.2025 x 0.2025 (mm)
Color Depth: 65k colors
Display Technology: a-Si TFT active matrix
Display Mode: Normal White, Transmissive
Display Interface: MCU_8bit
Viewing Direction: 3 o’clock(Grayscale Inversion) (1) 9 o’clock (2)
Surface Treatment: Anti-Glare(Cover glass)
Operating Temperature: -20 ~ +70°C
Storage Temperature: -30 ~ +80°C

Note:

For saturated color display content (eg. pure-red, pure-green, pure-blue, or pure-colors-combinations).
For “color scales” display content.
Color tone may slightly change by Temperature and Driving Conditions.

Block Diagram

Terminal Functions

Interface

Pin No.	Pin Name	I/O	Descriptions
1	VSS	P	Power Ground (0V)
2	VSS
3	BEN	****

I

| Backlight enable

BLEN=L, turn off Backlight BLEN=H, turn on Backlight

PWM(*1) brightness control

4| VDD| P| Positive Power Supply
5| VDD
6| /RD| I| /WR=H, /RD=L;

Data or Status read from the LCD module

7| /WR| I| /WR=LàH, RD=H;

Data or Instruction latch into the LCD module

8

| ****

D/C

| ****

I

| Register Select

D/C = H, Transferring the Display Data D/C = L, Transferring the Control Data

9

| ****

/CS

| ****

I

| Chip Select

/CS=L, enable access to the LCD interface

/CS=H, disable access to the LCD interface

10	D0	I	Data Input
17	D7	I	Data Input

18

| ****

/RES

| ****

I

| Reset signal

/RES = L, Initialization is executed

/RES = H, Normal runnings

19| DENMARK| O| Displaying Timing Frame Signal
20| NC| –| –
:| :| –| –
24| NC| –| –

Note:

The PWM frequency is between 5kHz and 10kHz.

Absolute Maximum Ratings

Items	Symbol	Min.	Max.	Unit	Condition
Supply Voltage	VDD	-0.3	+4.0	V	GND = 0V
Operating Temperature	TOP	-20	+70	°C	No Condensation
Storage Temperature	TEST	-30	+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.

Electrical Characteristics

DC Characteristics (MCU terminal)

VDD=3.0V, VSS=0V, TOP =25C

Items| Symbol| MIN.| TYP.| MAX.| Unit| Applicable Pin
---|---|---|---|---|---|---
Operating Voltage| VDD| 2.7| 3.0| 3.3| V| VDD
Input High Voltage| VIA| 0.8VDD| –| VDD| V| /RD, /WR, D/C, /CS, D0~D7, /RES,BLEN
Input Low Voltage| VIL| VSS| –| 0.2VDD| V
Output Signal High Voltage| VOH| 0.8VDD| –| VDD| V| D0~D7
Output Signal Low Voltage| VOL| VSS| –| 0.2VDD| V
Operating Current| ADD| –| 110| –| mA| All black, Backlight ON (BLEN=H)
–| 9.5| –| mA| All black, Backlight OFF (BLEN=L)

AC Characteristics

AC Timing

Signal| Symbol| Parameter| Spec.| Unit| Description
---|---|---|---|---|---
Min.| Typ| Max.
D/C| test| Address setup time| 10| –| –| ns|
that| Address hole time(Write/Read)| 10| –| –

/CS

| tCHW| Chip select “H” pulse width| 10| –| –|

ns

|
tCS| Chip select setup time(Write)| 56| –| –
tRCSFM| Chip select setup time(Read FM)| 440| –| –
CSF| Chip select wait time(Write/Read)| 12.5| –| –
that| Chip select hold time| 12.5| –| –

/WR

| tWC| Write cycle| 82.5| –| –|

ns

|
tWRH| Control pulse “H” duration| 18.75| –| –
twirl| Control pulse “L” duration| 18.75| –| –
/RD (FM)| CFNM| Read cycle(FM)| 560| –| –|

ns

| When read from frame memory
DFM| Control pulse “H” duration(FM)| 112| –| –
RDF| Control pulse “L” duration(FM)| 440| –| –

D[7:0]

| DST| Data setup time| 12.5| –| –|

ns

| For maximum CL=30pF

For minimum CL=8pF

DHT| Data hold time| 8| –| –
tractor| Read access time(FM)| –| –| 425
tODH| Output disable time| 16| –| 64

Note:

The input signal rise time and fall time(tr, tf) are specified at 15 ns or less.
Logic high and low levels are specified as 30% and 70% of VDD for input signals.
Refer to the ILI9341 datasheet for more details.

Register Write/Read timing (for CPU 8 Bit)

Commands

Note: Please refer to the ILI9341 data sheet for details.

Optical Characteristics

Item| Symbol| Condition| MIN.| TYP.| MAX.| UNIT| Note.
---|---|---|---|---|---|---|---
Viewing angle| θ=0o| ****

(CR≥10)

| 35| 45| –| degree| Note 2
θ=90o| 35| 45| –
θ=180o| 10| 20| –
θ=270o| 35| 45| –
Contrast ratio| CR| Φ=0o

θ=0o 25℃

| 400| 500| –| –| Note 3
Response Time| Ton| ****

–

| ****

16

| ****

–

| msec| ****

Note 4

Toff| msec

Chromaticity

| ****

White

| X| ****

Φ=0o

θ=0o

| 0.255| 0.305| 0.355| | ****

Note 1,5

Y| 0.275| 0.325| 0.375

Red

| X| 0.576| 0.626| 0.676
Y| 0.284| 0.334| 0.384

Green

| X| 0.227| 0.277| 0.327
Y| 0.499| 0.549| 0.599

Blue

| X| 0.092| 0.142| 0.192
Y| 0.072| 0.122| 0.172
NTSC Ratio| S| | –| 60| –| %
Luminance| L| Φ=0o

θ=0o

| –| 250| –| cd/m2| Note 7
Luminance uniformity| U| 80| –| –| %| Note 6

Note： The parameter is slightly changed by temperature, driving voltage, and material.

Note 1: The data are measured after LEDs are turned on for 5 minutes. LCM displays full white. The brightness is the average value of 9 measured spots. Measurement equipment PR-705

Measuring condition:

Measuring surroundings: Darkroom
Measuring temperature: Ta=25℃.

Adjust the operating voltage to get optimum contrast at the center of the display.

Note 2: The definition of viewing angle: Refer to the graph below marked by θ and Ф

Note 3: The definition of contrast ratio (Test LCM using PR-705): Contrast

(Contrast Ratio is measured in optimum common electrode voltage)

Note 4: Definition of Response time. (Test LCD using DMS501):

The output signals of the photodetector are measured when the input signals are changed from “black” to “white”(falling time) and from “white” to “black”(rising time), respectively.
The response time is defined as the time interval between the 10% and 90% of amplitudes. Refer to the figure below.

Note 5: Definition of Color of CIE1931 Coordinate and NTSC Ratio.

Color gamut:

Note 6: The luminance uniformity is calculated by using the following formula.

Bp = Bp (Min.) / Bp (Max.)×100 (%)
Bp (Max.) = Maximum brightness in 9 measured spots
Bp (Min.) = Minimum brightness in 9 measured spots.

Note 7: Measured the luminance of the white state at the center point.

Handling Precautions

LCD Module Design and Handling Precautions

Please ensure V0, and VCOM are adjustable, to enable the LCD module get the best contrast ratio under different temperatures, view angles, and positions.
Normally display quality should be judged under the best contrast ratio within the viewable area. Unexpected display patterns may come out under an abnormal contrast ratio.
Never operate the LCD module to exceed the absolute maximum ratings.
Never apply a signal to the LCD module without a power supply.
Keep the signal line as short as possible to reduce external noise interference.
IC chip (e.g. TAB or COG) is sensitive to light. Strong light might cause malfunction. Light-sealing structure casing is recommended.
Make sure there is enough space (with cushion) between the case and LCD panel, to prevent external force from passing on to the panel; otherwise, that may cause damage to the LCD and degrade its display result.
Avoid showing a display pattern on the screen for a long time (continuous ON segment).
LCD module reliability may be reduced by temperature shock.
When storing and operating LCD modules, avoid exposure to direct sunlight, high humidity, and high or low temperature. They may damage or degrade the LCD module.
Never leave the LCD module in extreme condition (max./min storage/operating temperature) for more than 48hr.
Recommend LCD module storage conditions are 0 C~40 C <80%RH.
LCD modules should be stored in a room without acid, alkali, and harmful gas.
Avoid dropping & violent shocking during transportation, and no excessive pressure press, moisture, and sunlight.
LCD modules can be easily damaged by static electricity. Please maintain an optimum anti-static working environment to protect the LCD module. (eg. ground the soldering irons properly)
Be sure to ground the body when handling the LCD module.
Only hold the LCD module by its sides. Never hold the LCD module by applying force on the heat seal or TAB.
When soldering, control the temperature and duration to avoid damaging the backlight guide or diffuser which might degrade the display result such as uneven display.
Never let the LCD module contact with corrosive liquids, which might cause damage to the backlight guide or the electric circuit of the LCD module.
Only clean LCD with a soft dry cloth, Isopropyl Alcohol, or Ethyl Alcohol. Other solvents (e.g. water) may damage the LCD.
Never add force to components of the LCD module. It may cause invisible damage or degrade the module’s reliability.
When mounting the LCD module, please make sure it is free from twisting, warping, and bending.
Do not add excessive force on the surface of the LCD, which may cause the display color to change abnormally.
LCD panel is made of glass. Any mechanical shock (e.g. dropping from a high place) will damage the LCD module.
The protective film is attached to the LCD screen. Be careful when peeling off this protective film, since static electricity may be generated.
The polarizer on the LCD gets scratched easily. If possible, do not remove the LCD protective film until the last step of installation.
When peeling off protective film from LCD, a static charge may cause abnormal display patterns. The symptoms are normal, and they will turn back to normal in a short while.
The LCD panel has sharp edges, please handle it with care.
Never attempt to disassemble or rework the LCD module.
If the display panel is damaged and a liquid crystal substance leaks out, be sure not to get any in your mouth, if the substance comes into contact with your skin or clothes promptly wash it off using soap and water.

Warranty

This product has been manufactured to our company’s specifications as a part for use in your company’s general electronic products. It is guaranteed to perform according to delivery specifications. For any other use apart from general electronic equipment, we cannot take responsibility if the product is used in medical devices, nuclear power control equipment, aerospace equipment, fire and security systems, or any other applications in which there is a direct risk to human life and where extremely high levels of reliability are required. If the product is to be used in any of the above applications, we will need to enter into a separate product liability agreement.

We cannot accept responsibility for any defect, which may arise from additional manufacturing of the product (including disassembly and reassembly), after product delivery.
We cannot accept responsibility for any defect, which may arise after the application of strong external force to the product.
We cannot accept responsibility for any defect, which may arise due to the application of static electricity after the product has passed our company’s acceptance inspection procedures.
When the product is in CCFL models, CCFL service life and brightness will vary according to the performance of the inverter used, leaks, etc.
We cannot accept responsibility for product performance, reliability, or defects, that may arise.
We cannot accept responsibility for the intellectual property of a third party, which may arise through the application of our product to our assembly with the exception to those issues relating directly to the structure or method of manufacturing of our product.