3.95inch Arduino Display-Mega2560 ST7796

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Product Picture

Product Description

• Support Arduino Mega2560 direct plug-in use
• 3.95-inch color screen, support 16BIT RGB 65K color display, display rich colors
• 320x480 resolution for clear display
• Supports 8-bit parallel bus transmission with fast transfer speed
• On-board 5V/3.3V level shifting IC, compatible with 5V/3.3V operating voltage
• Support touch function
• Provides an Arduino library with a rich sample program
• Available on C51 and STM32 platforms with a rich sample program
• Easy to expand the experiment with SD card slot
• Military-grade process standards, long-term stable work
• Provide underlying driver technical support

Product Parameters

Name	Parameter
Display Color	RGB 65K color
SKU	MAR3953
Screen Size	3.95(inch)
Type	TFT
Driver IC	ST7796S
Resolution	480*320 (Pixel)
Module Interface	8Bit or 16Bit parallel interface
Active Area	83.52x55.68(mm)
Module PCB Size	61.54x105.69 (mm)
back light	8 chip HighLight white LEDs
Operating Temperature	-20℃~60℃
Storage Temperature	-30℃~70℃
Operating Voltage	5V/3.3V
Power Consumption	TBD
Product Weight(Package containing)	68 (g)

Interface Definition

The blue box in the above figure is the 8-bit/16-bit data bus mode switch, which is described as follows:

Solder R5 with 0Ω resistor or short circuit directly, and disconnect R4: Select 16-bit data bus mode (default),use DB0~DB15 data pin

Solder R4 with 0Ω resistor or short circuit directly, and disconnect R5: Select 8-bit data bus mode use DB0~DB7 data pin

Number	Module Pin	Pin Description	Number	Module Pin	Pin Description
1	5V	Positive power supply	2	5V	Positive power supply
3	DB8	8th bit of data bus	4	DB9	9th bit of data bus
5	DB10	10th bit of data bus	6	DB11	11th bit of data bus
7	DB12	12th bit of data bus	8	DB13	13th bit of data bus
9	DB14	14th bit of data bus	10	DB15	15th bit of data bus
11	DB7	7th bit of data bus	12	DB6	6th bit of data bus
13	DB5	5th bit of data bus	14	DB4	4th bit of data bus
15	DB3	third bit of data bus	16	DB2	2nd bit of data bus
17	DB1	1st bit of data bus	18	DB0	0 bit of data bus
19	LCD_RS	LCD register / data selection signal Low level: register, high level: command	20	LCD_WR	LCD write control signal
21	LCD_CS	LCD screen select control signal, low level enable	22	LCD_RST	LCD reset control signal, low reset
23	NC	Undefined, reserved	24	LCD_RD	LCD read control signal
25	TP_IRQ	Touch screen interrupt control signal, low level when touch is detected	26	NC	Undefined, reserved
27	NC	Undefined, reserved	28	NC	Undefined, reserved
29	SD_CS	SD card select control signal, low level enable	30	NC	Undefined, reserved
31	MISO	SPI bus input signal	32	MOSI	Touch screen chip select control signal, low level enable
33	EX_CLK	SPI bus clock signal	34	TP_CS	SD card select control signal, low level enable
35	GND	Power ground	36	GND	Power ground

Connect to Arduino

Arduino Mega2560 direct insertion picture

How to use on Arduino

• Step 1: Download the test program

1. Download the Arduino test program from the Program Download column
2. For a description of the relevant test procedures, please refer to the test program documentation in the package

• Step 2: Connect the Arduino development board

1. Plug the module directly into the Arduino development board ( Do not plug in?)
2. After the module is plugged in, power on the Arduino board

• Step 3: Copy the dependent library

1. Make sure the Arduino IDE is installed on your computer (if it is not installed: Arduino IDE download URL)
2. After installing the Arduino IDE, you need to copy the dependent library to the Arduino project directory as follows:

(1) Decompress the downloaded test package

(2) Copy the dependent libraries in the Install libraries directory in the package (shown below) to the libraries folder

of the Arduino project directory （ Don't know the Arduino project directory?）

• Step 4: Compile and download the program to the development board

1. Open the sample in the Example directory of the package to test, compile and download（ Don't know how to compile and download?）

• Step 5: Observe the running of the program

1. After the program is downloaded, run it directly and observe the running status. If it can be displayed normally, the program runs

successfully, as shown in the following figure (take the colligate_test test program as an example):

Program Download

• 3.95 inch Arduino Mega2560 module package

Product Documentation

• 3.95 inch Arduino Mega2560 Module User Manual
• 3.95 inch Arduino Mega2560 Module Size Picture
• 3.95 inch TFT LCD Schematic and PCB Package Library
• Driver IC ST7796S Data sheet

Reference Materials

• Arduino IDE software use illustration
• C51 Keil and stc-isp software use illustration
• STM32 keil software use illustration
• PCtoLCD2002 software use illustration
• Image2Lcd software use illustration
• Chinese and English display modulo settings

Common Software

• PCtoLCD2002
• Image2Lcd

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