4.0inch 8&16BIT Module ST7796S SKU:MRB3951

== 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)
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 	TBD
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 	LCD data bus low 8-bit pin
8 	DB2 	LCD data bus low 8-bit pin
9 	DB3 	LCD data bus low 8-bit pin
10 	DB4 	LCD data bus low 8-bit pin
11 	DB5 	LCD data bus low 8-bit pin
12 	DB6 	LCD data bus low 8-bit pin
13 	DB7 	LCD data bus low 8-bit pin
14 	DB8 	LCD data bus high 8-bit pin (not used in 8-bit data bus mode)
15 	DB9 	LCD data bus high 8-bit pin (not used in 8-bit data bus mode)
16 	DB10 	LCD data bus high 8-bit pin (not used in 8-bit data bus mode)
17 	DB11 	LCD data bus high 8-bit pin (not used in 8-bit data bus mode)
18 	DB12 	LCD data bus high 8-bit pin (not used in 8-bit data bus mode)
19 	DB13 	LCD data bus high 8-bit pin (not used in 8-bit data bus mode)
20 	DB14 	LCD data bus high 8-bit pin (not used in 8-bit data bus mode)
21 	DB15 	LCD data bus high 8-bit pin (not used in 8-bit data bus mode)
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 	Module power positive pin (module has integrated voltage regulator IC, so the power supply can be connected to 5V or 3.3V)
26 	GND 	Module power ground pin
27 	GND 	Module power ground pin
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
# Download the STM32 test program from the Program Download column
# 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
# 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
# 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
# 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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