4.0inch 8&16BIT Module ST7796S SKU:MRB3951

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Product Picture

Product Description

• 4.0-inch color screen, support 16BIT RGB 65K color display, display rich colors
• 320x480 resolution for clear display
• Supports 8-bit and 16-bit parallel bus transmission with fast transfer speed
• Supports ALIENTEK STM32 Mini, Elite, WarShip, Explorer, and Apollo development boards TFTLCD for direct plug-in use
• Support for touch function
• Support SD card function expansion
• Provides a rich sample program for STM32 and C51 platforms
• Military-grade process standards, long-term stable work
• Provide underlying driver technical support

Product Parameters

Name	Parameter
Display Color	16BIT RGB 65K color
SKU	MRB3951
Screen Size	4.0(inch)
Type	TFT
Driver IC	ST7796S
Resolution	480*320 (Pixel)
Luminance	260Cd/m2
Module Interface	8bit or 16Bit parallel interface
Active Area	83.52x55.68(mm)
Module PCB Size	61.98x108.80 (mm)
Operating Temperature	-20℃~60℃
Storage Temperature	-30℃~70℃
Operating Voltage	3.3V~5V
Power Consumption	0.51W
Rough Weight(Package containing)	68 (g)

Interface Definition

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

Solder R2 with 0Ω resistor or short circuit directly, and disconnect R1: Select 16-bit data bus mode (default),use DB0~DB15 data pin

Solder R1 with 0Ω resistor or short circuit directly, and disconnect R2: Select 8-bit data bus mode use DB0~DB7 data pin

Number	Pin Label	Description
1	CS	LCD reset control pin( low level enable)
2	RS	LCD register / data selection control pin(high level: register, low level: data)
3	WR	LCD write control pin
4	RD	LCD read control pin
5	RST	LCD reset control pin( low level reset)
6	DB0	LCD data bus low 8-bit pin
7	DB1
8	DB2
9	DB3
10	DB4
11	DB5
12	DB6
13	DB7
14	DB8	LCD data bus high 8-bit pin (not used in 8-bit data bus mode)
15	DB9
16	DB10
17	DB11
18	DB12
19	DB13
20	DB14
21	DB15
22	SDCS	SD card selection control pin (used when using the SD card expansion function, this test program is not used)
23	BL	LCD backlight control pin(High level light)
24	VDD	Module power positive pin (module has integrated voltage regulator IC, so the power supply can be connected to 5V or 3.3V)
25	VDD
26	GND	Module power ground pin
27	GND
28	NC	LCD backlight power positive pin (default shared onboard backlight power supply, this pin can not be connected)
29	MISO	Touch screen SPI bus data input pin
30	MOSI	Touch screen SPI bus data output pin
31	PEN	Touch screen interrupt detection pin(Low level when a touch occurs)
32	FCS	Flash chip select control pin (used when using the Flash extension function, this test program is not used)
33	T_CS	Touch screen IC chip select control pin(Low level enable)
34	CLK	Touch screen SPI bus clock control pin

How to use on STM32 development board

This module is compatible with the ALIENTEK STM32 development board. The specific usage is as follows:

• Step 1: Download the test program

1. Download the STM32 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 STM32 development board

1. Find the TFTLCD Slot on the development board, connect the module pins and Slot(For example, the module CS pin corresponds to the slot CS pin),

and then plug them directly into the Slot

• Step 3: Compile and download the program to the development board

1. Compile and download the program you need to test to the STM32 development board（ Don't know how to compile and download?）

• Step 4: Observe the running of the program

1. After the program is finished, observe the running status of the program. If it can be displayed normally, the program runs successfully.

Program Download

• 4.0inch 16bit Parallel-Port Module package

Product Documentation

• 4.0inch 16bit Parallel-Port Module User Manual
• 4.0inch TFTLCD Specification
• 4.0inch 16bit Parallel-Port Module Size Picture(pdf Version)
• 4.0inch 16bit Parallel-Port Module Size Picture(jpg Version)
• 4.0inch 16bit Parallel-Port Module Schematic
• 4.0inch 16bit Parallel-Port Module LCD Schematic and PCB Package Library
• Driver IC ST7796S Data sheet

Reference Materials

• 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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