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The CAN protocol offers numerous advantages, including long transmission distances, flexible scalability in the number of nodes, and excellent noise immunity thanks to its differential signal design. It also supports message arbitration priority and error detection features. These characteristics make CAN a highly suitable communication interface for harsh environments and a popular choice across various industrial and automotive applications.

Key CAN applications include: automotive/industrial control/measurement instruments, two-wheelers/three-wheelers, AGV (Automated Guided Vehicles), energy storage systems, and elevator control systems.

LCD (Liquid Crystal Display) is widely used in instrument display applications. In the industrial control field, it is commonly found in devices such as electric meters and water meters. In the automotive market, LCDs are used in car and motorcycle dashboards. Small home appliances like rice cookers and electric shavers also often feature LCD displays. Additionally, LCDs are frequently used in medical equipment.

Depending on application needs and cost considerations, display technologies on the market can be categorized into types such as color LCDs, monochrome LCDs, and LED displays. For LCDs in particular, the panel typically consists of COM (common electrodes) and SEG (segment electrodes). An MCU can drive an LCD using either a built-in or external LCD driver, which generates the analog voltage waveforms needed to activate segments or patterns. This is achieved by applying the appropriate duty (COM) and bias voltages, enabling the display of user-defined images or information.

Comprehensive features of the CAN/LCD Applications:

● Supports up to 288-segment LCD displays, with flexible COM/SEG pin interchangeability, reducing PCB layout complexity
●Supports UART/CAN bootloader, enabling firmware updates via communication interfaces while powered on—eliminating the need for physical reprogramming and significantly reducing production and maintenance complexity
● Ideal for handheld instrument sensor applications, featuring built-in ADC, OPA, and PGA for detecting and amplifying small signals; ACMP for threshold detection; and DMA for fast data transfer
● Supports wide voltage range (1.8V to 5.5V) and industrial-grade temperature up to 105°C, making it suitable for a broader range of applications

LCD C/R-type: 

When using the internal charge pump, it is necessary to stabilize the drive by configuring the bias voltage through specific pin settings. It is recommended to connect a 0.1μF capacitor to the CVT pin and a 0.01μF capacitor to the CCP pin.

For power supply, you can choose either the internal AVDD or an external power source. The bias voltage can be generated using internal resistors combined with external capacitors, or alternatively configured through external resistors. This design supports both C-type and R-type LCD display types.

The internal resistor (R) can be switched between Low Drive and High Drive modes, with total resistance values of approximately 6MΩ and 290KΩ, respectively. These settings mainly affect the LCD’s driving current and brightness performance. For further brightness adjustment, external resistors can also be used.

CAN Application Block Diagram

LCD Application Block Diagram

MG32F02N/K Series Spec. 

*You can also visit Megawin Technology’s official website for the LCD/CAN demo applications page, which provides application schematics (SCH/PCB), sample application code, and comprehensive solution documentation for user reference.

CAN Demo application page:
https://www.megawin.com.tw/application/CAN-Demo 


LCD Demo application page:
https://www.megawin.com.tw/application/LCD-Demo

LCD Line (MG32F02NK Series) Products page:
https://www.megawin.com.tw/products-sub/M0-LCD-Line

Feel free to contact one of our dealers, or request one of our sales representatives (sales@megawin.com.tw)。

Megawin Technology Co., Ltd. 

www.megawin.com.tw

*TEL: +886-3-560-1501

*email: sales@megawin.com.tw