The specific pin layout of an ebike LCD display cable can vary depending on the make and model of your ebike, as well as the specific display you are using. Here we’d like to introduce the normal 5 pins based on UART protocol.
1 The pin for VCC
VCC is a common abbreviation for “voltage at the common collector”, which is also referred to as the power supply voltage or the positive power supply rail. In the context of an ebike LCD display cable, VCC is typically one of the pins that supplies power to the display.
VCC is usually denoted by a red wire, and is often connected to the positive terminal of a power source, such as a battery or power supply. This voltage level can vary depending on the specific display and its requirements, but is often around 5 volts or 12 volts DC.
It’s important to ensure that the correct voltage is supplied to the VCC pin, as supplying too high or too low a voltage can damage the display or other components of the ebike. If you are unsure about the voltage requirements for your specific display, it’s always a good idea to consult the manufacturer’s documentation or seek advice from a professional.
2 The pin for GND
GND is a common abbreviation for “ground”, which is the reference point for measuring voltage in an electrical circuit. In the context of an ebike LCD display cable, GND is typically one of the pins that provides a ground connection for the display.
GND is usually denoted by a black wire and is often connected to the negative terminal of a power source, such as a battery or power supply. The GND pin is important because it completes the circuit and allows current to flow properly between the display and other components in the ebike.↳
It’s important to ensure that the GND connection is made properly, as a poor or incomplete connection can cause problems with the display or other components of the ebike. If you are unsure about the GND connection or have any concerns, it’s always a good idea to consult the manufacturer’s documentation or seek advice from a professional.
3 The pin for TX
In the context of an ebike LCD display cable, TX is a pin that refers to the “transmit” pin, which is often used for serial communication between the display and other components of the ebike, such as a motor controller or a Bluetooth module.
TX is usually an output pin and is often denoted by a green or white wire. This pin sends data from the display to the other component, allowing them to communicate with each other. The specific communication protocol used can vary depending on the make and model of the components, but may include protocols such as UART, SPI, or I2C.
It’s important to ensure that the correct data format and protocol are used for the TX pin, as incorrect settings can cause communication errors or incorrect data transmission. If you are unsure about the correct settings or protocol for your specific components, it’s always a good idea to consult the manufacturer’s documentation or seek advice from a professional.
4 The pin for RX
In the context of an ebike LCD display cable, RX is a pin that refers to the “receive” pin, which is often used for serial communication between the display and other components of the ebike, such as a motor controller or a Bluetooth module.
RX is usually an input pin and is often denoted by a yellow or blue wire. This pin receives data from the other component, allowing the display to receive information such as motor speed, battery level, or error codes. The specific communication protocol used can vary depending on the make and model of the components, but may include protocols such as UART, SPI, or I2C.
It’s important to ensure that the correct data format and protocol are used for the RX pin, as incorrect settings can cause communication errors or incorrect data reception. If you are unsure about the correct settings or protocol for your specific components, it’s always a good idea to consult the manufacturer’s documentation or seek advice from a professional.
5 The pin for key
In the context of an ebike LCD display cable, “key” is a pin that is often used to detect whether a button or key on the display has been pressed.
The key pin is usually an input pin and is often denoted by a wire of a specific color, such as purple or brown. When a button or key on the display is pressed, the key pin will receive a signal indicating that the button has been pressed. This signal can be used by the display or other components in the ebike to perform a specific action, such as changing the display mode or turning on a light.
The specific function of the key pin and the buttons on the display can vary depending on the make and model of the display. Some displays may have multiple buttons, each with a dedicated key pin, while others may use a single key pin to detect all button presses.
It’s important to ensure that the correct key pin is connected to the corresponding button on the display, as incorrect connections can cause the display to function improperly. If you are unsure about the key pin or the function of the buttons on your specific display, it’s always a good idea to consult the manufacturer’s documentation or seek advice from a professional.
If you do not know the pins, here are a few ways to try to identify the pin layout:
Check the manufacturer’s website
If you have the make and model of your ebike and display, the manufacturer’s website may have documentation that includes the pin layout of the cable.
Use a multimeter
If you have a multimeter, you can use it to identify the pin layout by testing the continuity of each pin. For example, you can test the continuity of the power and ground pins by connecting the multimeter probes to those pins on one end of the cable and then testing the other end of the cable until you find the corresponding pins. You can repeat this process for each pin to identify its function.
Use a pinout diagram
If you are unable to find documentation from the manufacturer or do not have a multimeter, you may be able to find a pinout diagram online that matches your display model. This diagram will show the pin layout and function of each pin.
Note: If you are not familiar with working with electronics or have concerns about damaging your ebike, it is always recommended to consult a professional.
