Surenoo SMC0350B-320480 Series MCU Interface TFT LCD Module User Manual

Surenoo SMC0350B-320480 Series MCU Interface TFT LCD Module

Product Description

The product is a 3.5-inch TFT LCD display module with a capacitive touch screen. It has 480×320 resolution, supports 16BIT RGB 65K color display, and the internal driver IC is ILI9488, which uses 8-bit or 16-bit parallel port communication. The module includes LCD display, capacitive touch screen and PCB backplane. It can be plugged into the TFT LCD slot of the STM32 series development board or used on the C51 platform.

Product Features

• 3.5-inch color screen, support 16BIT RGB 65K color display, display rich colors
• 320×480 resolution for clear display
• Support 8-bit or 16-bit parallel data bus mode switching, fast transfer speed
• Supports ALIENTEK STM32 Mini, Elite, WarShip, Explorer, and Apollo development boards direct plug-in use
• Support for capacitive touch function
• 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

Interface Description

NOTE

1. The module hardware supports 8-bit and 16-bit parallel port data bus mode switching (shown in red box in Picture 1), as follows:
   • Solder R16 with 0Ω resistor or short circuit directly, and disconnect R8: Select 16-bit parallel port data bus mode, use DB0~DB15 data pins(default)
   • Solder R8 with 0Ω resistor or short circuit directly, and disconnect R16: Select 8-bit parallel port data bus mode, use DB0~DB7 data pins Important

Note

1. The following pin numbers 1~34 are the pin number of Module pin with PCB backplane of our company. If you purchase a bare screen, please refer to the pin definition of the bare screen specification, refer to the wiring according to the signal type instead of directly Wire according to the following module pin numbers.
   • For example  CS is 1 pin on our module. It may be x pin on different size bare screen.
2. About VCC supply voltage: If you buy a module with PCB backplane, VCC/VDD power supply can be connected to 5V or 3.3V (module has integrated ultra low dropout 5V to 3V circuit), but it is recommended to connect 3.3V, because connecting 5V will lead to circuit Increased heat generation, affecting module life; if you buy a bare screen LCD, remember to only connect 3.3V.
3. About the backlight voltage: The module with the PCB backplane has integrated triode backlight control circuit, which only needs to input the high level of the BL pin or the PWM wave to illuminate the backlight. If you are buying a bare screen, the LEDAx is connected to 3.0V-3.3V and the LEDKx is grounded.

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(When using the 8-bit parallel port data bus mode, the upper 8-bit pin is not used.)
15| DB9
16| DB10
17| DB11
18| DB12
19| DB13
20| DB14
21| DB15
22| GND| Module power ground pin
---|---|---
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| NC| Not defined, no need to use
30| SDA| Capacitive touch screen IIC bus data pin
31| INT| Capacitive touch screen interrupt detection pin

(low level when a touch occurs)

32| NC| Not defined, no need to use
33| CRST| Capacitive touch screen IC reset control pin (low

level reset)

34| SCL| Capacitive touch screen IIC bus clock pin

Hardware Configuration

• The LCD module hardware circuit comprises five parts: an LCD display control circuit, a power control circuit, a data bus mode selection control circuit, a touch screen control circuit and a backlight control circuit.
• LCD display control circuit for controlling the pins of the LCD, including control pins and data transfer pins.
• Power control circuit for stabilizing the supply voltage and selecting the external supply voltage
• Data bus mode selection control circuit for selecting 8-bit or 16-bit data bus mode.
• A capacitive touch screen control circuit is used to control touch screen interrupt acquisition, data sampling, AD conversion, data transmission, etc.
• A backlight control circuit is used to control the brightness of the backlight.

working principle

Introduction to ITI9488 Controller

The ITI488 controller supports a maximum resolution of 320*480 and has a 345600-byte GRAM. It also supports 8-bit, 9-bit, 16-bit, 18-bit and 24-bit parallel port data buses. It also supports 3-wire and 4-wire SPI serial ports. Since the supported resolution is relatively large and the amount of data transmitted is large, the parallel port transmission is adopted, and the transmission speed is fast. ITI9488 also supports 65K, 262K and 16.7M RB color display, display color is very rich, while supporting rotating display and scroll display and video playback, display in a variety of ways. The ITI9488 controller uses 16bit (RGB565) to control a pixel display, so it can display up to 65K colors per pixel. The pixel address setting is performed in the order of rows and columns, and the incrementing and decreasing direction is determined by the scanning mode. The |TI9488 display method is performed by setting the address and then setting the color value.

Introduction to parallel port communication

The parallel port communication write mode timing is as shown below:

The timing of the parallel port communication read mode is shown in the figure below:

Note: RDX is an unsynchronized signal that can be terminated when not being used.

When the D/CX signal is driven to the low level, the input data on the interface is interpreted as internal status or parameter data. The D/CX signal can also be pulled to a high level when the data on the interface is RAM data or a command parameter data.

CSX is a chip select signal for enabling and disabling parallel port communication, active low

• RESX is an external reset signal, active low
• D/CX is the data or command selection signal, 1-write data or command parameters,
• O-write command
• WRX is a write data control signal
• RDX is a read data control signal
• D[X:0] is a parallel port data bit, which has four types: 8-bit, 9-bit, 16-bit, and 18-bit.

When performing a write operation, on the basis of the reset, first set the data or command selection signal, then pull the chip select signal low, then input the content to be written from the host, and then pull the write data control signal low. When pulled high, data is written to the LCD control IC on the rising edge of the write control signal. Finally, the chip select signal is pulled high and a data write operation is completed.

When entering the read operation, on the basis of the reset, first pull the chip select signal low, then pull the data or command select signal high, then pull the read data control signal low, and then read the data from the LCD control IC. And then The read data control signal is pulled high, and the data is read out on the rising edge of the read data control signal. Finally, the chip select signal is pulled high, and a data read operation is completed.

Instructions for use

STM32 instructions

_ Wiring instructions: _See the interface description for pin assignments.

Note

1. This module can be directly inserted into the TFT LCD slot of the punctual atom development board, no manual wiring is required.
2. The following internal plug-in pins of the corresponding MCU refer to the MCU pins directly connected to the TFT LCD slot inside the development board, only for reference.

MiniSTM32 development board TFTLCD socket in-line instructions

Number| ****

Module Pin

| Corresponding

TFTLCD socket pin

| Corresponding to STM32F103RCT6

microcontroller internal connection pin

1| CS| CS| PC9
2| RS| RS| PC8
3| WR| WR| PC7
4| RD| RD| PC6
5| RST| RST| PC4
6| DB0| D0| PB0
7| DB1| D1| PB1
8| DB2| D2| PB2
9| DB3| D3| PB3
10| DB4| D4| PB4
11| DB5| D5| PB5
---|---|---|---
12| DB6| D6| PB6
13| DB7| D7| PB7
14| DB8| D8| PB8
15| DB9| D9| PB9
16| DB10| D10| PB10
17| DB11| D11| PB11
18| DB12| D12| PB12
19| DB13| D13| PB13
20| DB14| D14| PB14
21| DB15| D15| PB15
22| GND| GND| GND
23| BL| BL| PC10
24| VDD| 3.3| 3.3V
25| VDD| 3.3| 3.3V
26| GND| GND| GND
27| GND| GND| GND
28| NC| Not used| 5V
29| NC| Not used| PC2
30| SDA| MOSI| PC3
31| INT| PEN| PC1
32| NC| Not used| NC
33| CRST| TCS| PC13
34| SCL| CLK| PC0

Elite STM32 development board TFTLCD socket in- line instructions

Number| ****

Module Pin

| Corresponding TFTLCD socket pin| Corresponding to STM32F103ZET6 microcontroller internal connection pin
1| CS| CS| PG12
2| RS| RS| PG0
3| WR| WR| PD5
4| RD| RD| PD4
---|---|---|---
5| RST| RST| reset pin
6| DB0| D0| PD14
7| DB1| D1| PD15
8| DB2| D2| PD0
9| DB3| D3| PD1
10| DB4| D4| PE7
11| DB5| D5| PE8
12| DB6| D6| PE9
13| DB7| D7| PE10
14| DB8| D8| PE11
15| DB9| D9| PE12
16| DB10| D10| PE13
17| DB11| D11| PE14
18| DB12| D12| PE15
19| DB13| D13| PD8
20| DB14| D14| PD9
21| DB15| D15| PD10
22| GND| GND| GND
23| BL| BL| PB0
24| VDD| VDD| 3.3V
25| VDD| VDD| 3.3V
26| GND| GND| GND
27| GND| GND| GND
28| NC| Not used| 5V
29| NC| Not used| PB2
30| SDA| MOSI| PF9
31| INT| PEN| PF10
32| NC| Not used| NC
33| CRST| TCS| PF11
34| SCL| CLK| PB1

WarShip STM32 development board TFTLCD socket in- line instructions

Number

| ****

Module Pin

| Corresponding TFTLCD socket pin| Corresponding to STM32F103ZET6

microcontroller internal connection pin

V2| V3
1| CS| CS| PG12
2| RS| RS| PG0
3| WR| WR| PD5
4| RD| RD| PD4
5| RST| RST| reset pin
6| DB0| D0| PD14
7| DB1| D1| PD15
8| DB2| D2| PD0
9| DB3| D3| PD1
10| DB4| D4| PE7
11| DB5| D5| PE8
12| DB6| D6| PE9
13| DB7| D7| PE10
14| DB8| D8| PE11
15| DB9| D9| PE12
16| DB10| D10| PE13
17| DB11| D11| PE14
18| DB12| D12| PE15
19| DB13| D13| PD8
20| DB14| D14| PD9
21| DB15| D15| PD10
22| GND| GND| GND
23| BL| BL| PB0
24| VDD| VDD| 3.3V
25| VDD| VDD| 3.3V
26| GND| GND| GND
27| GND| GND| GND
28| NC| Not used| 5V
29| NC| Not used| PF8| PB2
---|---|---|---|---
30| SDA| MOSI| PF9
31| INT| PEN| PF10
32| NC| Not used| NC
33| CRST| TCS| PB2| PF11
34| SCL| CLK| PB1

Explorer STM32F4 development board TFTLCD socket in-line instructions

Number| ****

Module Pin

| Corresponding

TFTLCD socket pin

| Corresponding to STM32F407ZGT6

microcontroller internal connection pin

1| CS| CS| PG12
2| RS| RS| PF12
3| WR| WR| PD5
4| RD| RD| PD4
5| RST| RST| reset pin
6| DB0| D0| PD14
7| DB1| D1| PD15
8| DB2| D2| PD0
9| DB3| D3| PD1
10| DB4| D4| PE7
11| DB5| D5| PE8
12| DB6| D6| PE9
13| DB7| D7| PE10
14| DB8| D8| PE11
15| DB9| D9| PE12
16| DB10| D10| PE13
17| DB11| D11| PE14
18| DB12| D12| PE15
19| DB13| D13| PD8
20| DB14| D14| PD9
21| DB15| D15| PD10
22| GND| GND| GND
---|---|---|---
23| BL| BL| PB15
24| VDD| VDD| 3.3V
25| VDD| VDD| 3.3V
26| GND| GND| GND
27| GND| GND| GND
28| NC| Not used| 5V
29| NC| Not used| PB2
30| SDA| MOSI| PF11
31| INT| PEN| PB1
32| NC| Not used| NC
33| CRST| TCS| PC13
34| SCL| CLK| PB0

Apollo STM32F4/F7 development board TFTLCD socket in-line instructions

Number

| ****

Module Pin

| Corresponding TFTLCD socket pin| Corresponding to STM32F429IGT6 、 STM32F767IGT6 、 STM32H743IIT6

microcontroller internal connection pin

1| CS| CS| PD7
2| RS| RS| PD13
3| WR| WR| PD5
4| RD| RD| PD4
5| RST| RST| reset pin
6| DB0| D0| PD14
7| DB1| D1| PD15
8| DB2| D2| PD0
9| DB3| D3| PD1
10| DB4| D4| PE7
11| DB5| D5| PE8
12| DB6| D6| PE9
13| DB7| D7| PE10
14| DB8| D8| PE11
---|---|---|---
15| DB9| D9| PE12
16| DB10| D10| PE13
17| DB11| D11| PE14
18| DB12| D12| PE15
19| DB13| D13| PD8
20| DB14| D14| PD9
21| DB15| D15| PD10
22| GND| GND| GND
23| BL| BL| PB5
24| VDD| VDD| 3.3V
25| VDD| VDD| 3.3V
26| GND| GND| GND
27| GND| GND| GND
28| NC| Not used| 5V
29| NC| Not used| PG3
30| SDA| MOSI| PI3
31| INT| PEN| PH7
32| NC| Not used| NC
33| CRST| TCS| PI8
34| SCL| CLK| PH6

Operating Steps

• Connect the LCD module(As shown in Picture 1) and the STM32 MCU according to the above wiring instructions, and power on;
• Select the C51 test program to be tested, as shown below: (Please refer to the test program documentation for the test program description. If you need to use patch, please refer to the patch documentation in the STM32_Demo_patch directory.)
• Open the selected test program project, compile and download; detailed description of the STM32 test program compilation and download can be found in the following document: http://www.lcdwiki.com/res/PublicFile/STM32_Keil_Use_Illustration_EN.pdf
• If the LCD module displays characters and graphics normally, the program runs successfully；

C51 instructions

Wiring instructions: See the interface description for pin assignments.

Note:

1. Since the input and output levels of the GPIO of the STC12C5A60S2 microcontroller are 5V, the capacitive touch IC cannot work normally (only 1.8~3.3V can be accepted). If you want to use the capacitive touch function, you need to connect to the level conversion module;
2. Since the STC89C52RC microcontroller does not have a push-pull output function, the backlight control pin needs to be connected to a 3.3V power supply to be properly lit.
3. Since the STC89C52RC microcontroller’s Flash capacity is too small (less than 25KB), the program with touch function cannot be downloaded, so the touch screen does not need wiring.

STC12C5A60S2 microcontroller test program wiring instructions

Number| ****

Module Pin

| Corresponding to STC12 development board

wiring pin

1| CS| P13
2| RS| P12
3| WR| P11
4| RD| P10
5| RST| P33
6| DB0| P00
7| DB1| P01
8| DB2| P02
9| DB3| P03
10| DB4| P04
11| DB5| P05
12| DB6| P06
13| DB7| P07
14| DB8| P20
15| DB9| P21
16| DB10| P22
17| DB11| P23
18| DB12| P24
19| DB13| P25
---|---|---
20| DB14| P26
21| DB15| P27
22| GND| GND
23| BL| P32
24| VDD| 3.3V/5V
25| VDD| 3.3V/5V
26| GND| GND
27| GND| GND
28| NC| No need to connect
29| NC| No need to connect
30| SDA| P34
31| INT| P40
32| NC| No need to connect
33| CRST| P37
34| SCL| P36

STC89C52RC microcontroller test program wiring instructions

Number| ****

Module Pin

| Corresponding to STC89 development board

wiring pin

1| CS| P13
2| RS| P12
3| WR| P11
4| RD| P10
5| RST| P14
6| DB0| P30
7| DB1| P31
8| DB2| P32
9| DB3| P33
10| DB4| P34
11| DB5| P35
12| DB6| P36
13| DB7| P37
---|---|---
14| DB8| P20
15| DB9| P21
16| DB10| P22
17| DB11| P23
18| DB12| P24
19| DB13| P25
20| DB14| P26
21| DB15| P27
22| GND| GND
23| BL| 3.3V
24| VDD| 3.3V/5V
25| VDD| 3.3V/5V
26| GND| GND
27| GND| GND
28| NC| No need to connect
29| NC| No need to connect
30| SDA| No need to connect
31| INT| No need to connect
32| NC| No need to connect
33| CRST| No need to connect
34| SCL| No need to connect

Operating Steps

• Connect the LCD module (As shown in Picture 1)and the C51 MCU according to the above wiring instructions, and power on;
• Select the C51 test program to be tested, as shown below: (Test program description please refer to the test program description document in the test package)
• Open the selected test program project, compile and download; detailed description of the C51 test program compilation and download can be found in the following document: http://www.lcdwiki.com/res/PublicFile/C51_Keil%26stc-isp_Use_Illustration_EN.pdf
• If the LCD module displays characters and graphics normally, the program runs successfully；

Software Description

Code Architecture

C51 and STM32 code architecture description

The code architecture is shown below:

• The Demo API code for the main program runtime is included in the test code;
• LCD initialization and related bin parallel port write data operations are included in the LCD code;
• Drawing points, lines, graphics, and Chinese and English character display related operations are included in the GUI code;
• The main function implements the application to run;
• Platform code varies by platform;
• The IIC code is used by the capacitive touch IC GT911, including IIC initialization, data writing and reading, etc;
• GT911 touch control code includes touch detection, touch command transmission and touch data reading, etc.
• The key processing related code is included in the key code (the C51 platform does not have a button processing code);
• The code related to the led configuration operation is included in the led code(the C51 platform does not have a led processing code);

GPIO definition description

STM32 test program GPIO definition description

The GPIO definition of the LCD screen of the STM32 test program is placed in the led.h file, which is defined in two ways:

1. STM32F103RCT6 microcontroller test program uses 10 analog mode (it does not support FSMC bus)
2. Other STM32 MCU test programs Use FSMC bus mode

STM32F103RCT6 MCU I0 analog test program LCD screen GPIO definition as shown below:

FSMC test program lcd screen GPIO is defined as shown below (take STM32F103ZET6 microcontroller FSMC test program as an example):

The STM32 touch screen related GPIO definition consists of two parts: IIC’s GPIO definition and screen interrupt and reset GPIO definition. The IIC GPIO definition is placed in the gtiic.h file as shown below (take the
STM32F103ZET6 microcontroller FSMC test program as an example):

The interrupt of the screen and the reset GPIO definition are placed in GT911.h, as shown in the following figure (take the STM32F103ZET6 microcontroller FSMC test program as an example):

C51 test program GPIO definition description

C51 test program lcd screen GPIO definition is placed in the lcd.h file, as shown below(Taking the STC12C5A60S2 microcontroller test program as an example):

Parallel pin definition needs to select the whole set of GPIO port groups, such as P0, P2, etc., so that when transferring data, the operation is convenient.Other pins can be defined as any free GPIO.

• The C51 touch screen related GPIO definition consists of two parts: IIC’s GPIO definition and screen interrupt and reset GPIO definition.

• The IIC GPIO definition is placed in the gtiic.h file as shown below (take the STC12C5A60S2 microcontroller test program as an example):

• The interrupt of the screen and the reset GPIO definition are placed in GT911.h, as shown in the following figure (take the STC12C5A60S2 microcontroller test program as an example):

• The GPIO definition of the touch screen can be modified and can be defined as any other free GPIO.
• If the microcontroller does not have a P4 GPIO group, penirq can be defined as other GPIOs.

Parallel port communication code implementation

STM32 test program parallel port communication code implementation

The STM32 test program parallel port communication code is placed in the LCD.c file, which is implemented in two ways:

1. STM32F103RCT6 microcontroller test program uses IO analog mode (it does not support FSMC bus)
2. Other STM32 MCU test programs use FSMC bus mode
   • The IO simulation test program is implemented as shown below:
   • The FSMC test program is implemented as shown below:

• Both 8- and 16-bit command writes and 8- and 16-bit data writes and reads are implemented.

C51 test program parallel port communication code implementation

• The relevant code is implemented in the LCD.c file as shown below:
• Implemented 8-bit and 16-bit commands and 8-bit and 16-bit data write and read.

Common software

This set of test examples requires the display of Chinese and English, symbols and pictures, so the modulo software is used. There are two types of modulo software: Image2Lcd and PCtoLCD2002. Here is only the setting of the modulo software for the test program.

The PCtoLCD2002 modulo software settings are as follows:

• Dot matrix format select Dark code the modulo mode select the progressive mode
• Take the model to choose the direction (high position first)
• Output number system selects hexadecimal number
• Custom format selection C51 format
• The specific setting method is as follows: http://www.lcdwiki.com/Chinese_and_English_display_modulo_settings,

Image2Led modulo software settings are shown below:

• The Image2Lcd software needs to be set to horizontal, left to right, top to bottom, and low position to the front scan mode.

QR CODES

Shenzhen Surenoo Technology Co.,Ltd.

• www.surenoo.com
• Skype: Surenoo365

References

• Chinese and English display modulo settings - LCD wiki
• Surenoo Tech: Professional LCD Module Supplier Since 2005

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