Surenoo SSP0154A-240240 Series SPI TFT LCD Module User Manual
- June 2, 2024
- Surenoo
Table of Contents
- SSP0154A-240240 Series SPI TFT LCD Module
- Product Description
- Product Features
- Product Parameters
- Interface Description
- Important:
- Hardware Configuration
- Working principle
- Instructions for use
- **C51 instructions
- MSP430 instructions
- Software Description
- Common software
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
SSP0154A-240240 Series SPI TFT LCD Module
User Manual 
Model No.: SSP0154A-240240
SSP0154A-240240 Series SPI TFT LCD Module
SSP0154A-240240 Series
SPI TFT LCD Module USER MANUAL
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Reference Controller Datasheet
SPI TFT LCD Module Selection Guide ST7789V
Product Description
This product is a 1.54inch IPS display module,it has a resolution of
240×240.it uses a 4-wire SPI communication method and the inner IC is
ST7789.The module contains an
LCD display and PCB backboard.
Product Features
- 1.54-inch color screen,support 65K color display,display rich colors
- 240X240 resolution, clear display
- Large viewing angle(full angle),display color undistorted.
- Using the 4-line-SPI serial bus, it only takes a few IOs to illuminate the display
- Provide a rich STM32, C51 and MSP430 sample program
- Military-grade process standards, long-term stable work
- Provide underlying driver technical support
Product Parameters
| Name | Description |
|---|---|
| Display Color | RGB 65K color |
| SKU | MSP1541 |
| Screen Size | 1.54(inch) |
| Type | TFT |
| Driver IC | ST7789 |
| Resolution | 240*240 (Pixel) |
| Module Interface | 4-line SPI interface |
| Active Area | 27.72×27.72 (mm) |
| Touch Screen Type | have no touch screen |
| Touch IC | have no touch IC |
| Module PCB Size | 32.00×43.72(mm) |
| Angle of view | all angle |
| Operating Temperature | -10℃~60℃ |
| Storage Temperature | -20℃~70℃ |
| Operating Voltage | 3.3V |
| Power Consumption | TBD |
| Product Weight(With packaging) | 10(g) |
Interface Description
Important:
- The following pin numbers 1~8 refer to the module pin numbers of our company with PCB backplane. If you are buying 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 according to the following. The module pin number is used for wiring. For example: DC is 6 feet on our module. It may be x pin on different size bare screen.
- About VCC supply voltage: The IPS display module can only be connected to 3.3V.
- About backlight voltage: The module with PCB backplane has integrated triode backlight control circuit, only need to input high level or PWM wave on BL pin to backlight. If you are buying a bare screen, the LEDAx is connected to 3.0V-3.3V, and the LEDKx can be grounded.
| Number | Module Pin | Pin Description |
|---|---|---|
| 1 | GND | LCD Power ground |
| 2 | VCC | LCD power supply is positive (3.3V) |
| 3 | SCL | LCD SPI bus clock signal |
| 4 | SDA | LCD SPI bus write data signal |
| 5 | RES | LCD reset control signal(Low level reset) |
| 6 | DC | LCD register / data selection control signal(Low level: register, high |
level: data)
7| CS| LCD chip select control signal (low level enable)
8| BLK| LCD backlight control signal (high level lighting, if you do not need
control, please connect 3.3V)
Hardware Configuration
The LCD module hardware circuit comprises two parts: an LCD display control
circuit and a backlight control circuit.
The LCD display control circuit is used to control the pins of the LCD,
including control pins and data transfer pins.
The backlight control circuit is used to control the backlight to be on and
off. Of course, if the backlight is not required to be be on and off, can be
directly connected to the 3.3V power supply.
Working principle
1. Introduction to ST7789 Controller
The ST7789 controller supports a maximum resolution of 240*320 and a
172800-byte GRAM. It also supports 8-bit, 9-bit, 16-bit, and 18-bit parallel
port data buses. It also supports 3-wire and 4-wire SPI serial ports. Since
parallel control requires a large number of IO ports, the most common one is
SPI serial port control. The ST7789 also supports 65K, 262K RGB color display,
display color is very rich, while supporting rotating display and scroll
display and video playback, display in a variety of ways.
The ST7789 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 ST7789 display method is
performed by setting the address and then setting the color value.
2. Introduction to SPI communication protocol
The 4-wire SPI bus write mode timing is shown in the following figure:
CSX is a slave chip select, and the chip
is enabled only when CSX is low.
D/CX is the data/command control pin of the chip. When DCX is low, the command
is written.
When it is high, the data is written. SCL is the SPI bus clock, and each
rising edge transmits 1 bit of data;
SDA is the data transmitted by SPI, and it transmits 8-bit data at a time. The
data format is as shown below:
The high position is in front and
transmitted first.
For SPI communication, the data has a transmission timing, that is, a
combination of clock phase (CPHA) and clock polarity (CPOL):
The CPOL level determines the idle state level of the serial synchronous
clock, CPOL = 0, which is low. CPOL does not have a lot of impact on the
transport protocol;
The level of CPHA determines whether the serial synchronous clock is acquired
on the first clock transition edge or the second clock transition edge.
When CPHL = 0, data acquisition is performed on the first edge of the
transition;
The combination of the two becomes the four SPI communication methods. SPI0 is
usually used in China, that is, CPHL = 0, CPOL = 0.
Instructions for use
1. STM32 instructions
Wiring instructions: See the interface description for pin assignments.
STM32F103RCT6 microcontroller test program wiring instructions
Number| Module Pin|
Corresponding to MiniSTM32 development board wiring pin
1| GND| GND
2| VCC| 3.3V
3| SCL| PB13
4| SDA| PB15
5| RES| PB12
6| DC| PB10
7| CS| PB11
8| BLK| PB9
STM32F103ZET6 microcontroller test program wiring instructions
Number| Module Pin|
Corresponding to Elite STM32 development board wiring pin
1| GND| GND
2| VCC| 3.3V
3| SCL| PB13
4| SDA| PB15
5| RES| PB12
6| DC| PB10
7| CS| PB11
8| BLK| PB9
STM32F407ZGT6 microcontroller test program wiring instructions
Number
| Module Pin|
Corresponding to Explorer STM32F4 development board wiring pin
1| GND| GND
2| VCC| 3.3V
3| SCL| PB3
4| SDA| PB5
5| RES| PB12
6| DC| PB14
7| CS| PB15
8| BLK| PB13
STM32F429IGT6 microcontroller test program wiring instructions
Number
| Module Pin|
Corresponding to Apollo STM32F4/F7 development board wiring pin
1| GND| GND
2| VCC| 3.3V
3| SCL| PF7
4| SDA| PF9
5| RES| PD12
6| DC| PD5
7| CS| PD11
8| BLK| PD6
STM32F767IGT6 and STM32H743IIT6 microcontroller test program wiring instructions
Number
| Module Pin|
Corresponding to Apollo STM32F4/F7 development board wiring pin
1| GND| GND
2| VCC| 3.3V
---|---|---
3| SCL| PB13
4| SDA| PB15
5| RES| PD12
6| DC| PD5
7| CS| PD11
8| BLK| PD6
Operating Steps
A. Connect the IPS module and the STM32 MCU according to the above wiring
instructions, and power on;
B. Select the test example according to the model of the microcontroller, as
shown in the following figure: (Please refer to the test program description
document in the test package for the test program description)
C. 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
D. If the IPS module displays characters and graphics normally, the program
runs successfully
**C51 instructions
**
Wiring instructions:
See the interface description for pin assignments.
STC89C52RC and STC12C5A60S2 microcontroller test program wiring instructions
Number| Module Pin|
Corresponding to STC89/STC12 development board wiring pin
1| GND| GND
2| VCC| 3.3V
3| SCL| P17
4| SDA| P15
5| RES| P33
6| DC| P12
7| CS| P13
8| BLK| P32
Operating Steps
A. Connect the IPS module and the C51 MCU according to the above wiring
instructions, and power on;
B. Select the C51 test program to be tested, as shown below: (Please refer to
the test program description document in the test package for the test program
description)
C. 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
D. If the IPS module displays characters and graphics normally, the program
runs successfully
MSP430 instructions
Wiring instructions:
See the interface description for pin assignments.
MSP430F149 microcontroller test program wiring instructions
Number| Module Pin|
Corresponding to MSP430 development board wiring pin
1| GND| GND
2| VCC| 3.3V
3| SCL| P33
4| SDA| P31
5| RES| P22
6| DC| P21
7| CS| P23
8| BLK| P20
Operating Steps
A. Connect the IPS module and the MSP430 MCU according to the above wiring
instructions, and power on;
B. Select the MSP430 test program to be tested, as shown below: (Please refer
to the test program description document in the test package for the test
program description)
C. Open the selected test program
project, compile and download; detailed description of the MSP430 test program
compilation and download can be found in the following document:
http://www.lcdwiki.com/res/PublicFile/IAR_IDE%26MspFet_Use_Illustration_EN.pdf
D. If the IPS module displays characters and graphics normally, the program
runs successfully
Software Description
1. Code Architecture
A. C51, STM32 and MSP430 code architecture description
The code architecture is shown below:
The Demo API code of the main program runtime is included in the test code;
LCD initialization and related 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;
SPI initialization and configuration related operations are included in the
SPI code;
The key processing related code is included in the key code (the C51 and MSP
430 platform does not have a button processing code);
The code related to the led configuration operation is included in the led
code(the MSP 430 platform does not have a led code);
2. software SPI and hardware SPI description
The IPS module provides software SPI and hardware SPI sample code (except
STC89C52RC, because it does not have hardware SPI function), the two sample
code does not make any difference in the display content, but the following
aspects are different:
A. display speed
The hardware SPI is significantly faster than the software SPI, which is
determined by the hardware.
B. GPIO definition
The software SPI all control pins must be defined, any idle pin can be used,
the hardware SPI data and clock signal pins are fixed (depending on the
platform), other control pins should be defined by themselves, or any idle
reference can be used. foot.
C. initialization
When the software SPI is initialized, only the GPIO for pin definition needs
to be initialized (not required by the C51 platform). When the hardware SPI is
initialized, the relevant control registers and data registers need to be
initialized.
3. GPIO definition description
A. STM32 test program GPIO definition description non-SPI GPIO definition
is placed in lcd.h as shown below(take STM32F103RCT6 microcontroller FSMC test
program as an example):
All pin definitions can be modified and
can be defined as any other free GPIO. If you are using a hardware SPI test
program, you do not need to define the GPIO of the SPI. If you use the
software SPI test program, the SPI GPIO definition is placed in spi.h, as
shown below (take STM32F103RCT6 microcontroller test program as an example):
all pin definitions can be modified and
can be defined as any other free GPIO.
B. C51 test program GPIO definition description
GPIO definition is placed in the lcd.h file, as shown below:
If the software SPI is used, all pin
definitions can be modified and can be defined as any other free GPIO.
If hardware SPI is used, the LCD_BL, LCD_RS, LCD_CS, and LCD_RST pin
definitions can be modified and can be defined as any other free GPIO. LCD_CLK
and LCD_SDI do not need to be defined.
C. MSP430 test program GPIO definition description
non-SPI GPIO definition is placed in lcd.h as shown below:
All pin definitions can be modified and
can be defined as any other free GPIO.
If you are using a hardware SPI test program, you do not need to define the
GPIO of the SPI.
If you use the software SPI test program, the SPI GPIO definition is placed in
spi.h, as shown below:
all pin definitions can be modified and
can be defined as any other free GPIO.
4. SPI communication code implementation
A. STM32 test program SPI communication code implementation
Hardware SPI communication is implemented by the system. We only need to
operate the register and call the relevant function. For details, please refer
to the MCU related documentation.
The software SPI communication code is implemented in spi.c ,as shown in the
following figure:
If the transmitted data bit is 1, the
SPI data pin is pulled high. When it is 0, the SPI data pin is pulled low, one
byte of data is transferred each time, the upper bit is first, and one bit of
data is transmitted on each rising edge of the clock.
B. C51 test program SPI communication code implementation
The software SPI communication code is implemented in lcd.c ,as shown in the
following figure:
If the transmitted data bit is 1, the
SPI data pin is pulled high. When it is 0, the SPI data pin is pulled low, one
byte of data is transferred each time, the upper bit is first, and one bit of
data is transmitted on each rising edge of the clock.
C. MSP430 test program SPI communication code implementation
The software SPI communication code is implemented in spi.c ,as shown in the
following figure:
If the transmitted data bit is 1, the SPI data pin is pulled high. When it is 0, the SPI data pin is pulled low, one byte of data is transferred each time, the upper bit is first, and one bit of data is transmitted on each rising edge of the clock.
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
Image2Lcd 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.
References
- Chinese and English display modulo settings - LCD wiki
- Surenoo Tech: Professional LCD Module Supplier Since 2005
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