Product development novices are often confused about the choice of connection method. In what specific cases does the display module need to use I2C (Inter-Integrated Circuit) for communication?
Compared with the parallel interface, the wiring of I2C is simple, does not require a large number of signal lines, and is easy to wire and solder. I2C is a serial communication protocol that allows multiple devices to communicate through two lines (SDA data line and SCL clock line). This is very useful for microcontrollers with a limited number of pins (such as some single-chip microcomputers or development boards). If there is limited space available for connection, we will choose i2c to save pins.
If multiple I2C devices (such as sensors, displays, and other peripherals) need to be connected to the same master controller, using I2C can be easily expanded.
For some low-speed applications, I2C provides a suitable communication speed (100 kHz in standard mode and up to 400 kHz in fast mode) to meet the needs.
The I2C protocol allows devices to be dynamically added and removed on the same bus, so it is very useful when flexible hardware configuration is required. In certain environments, some display modules (such as OLED displays) only support the I2C communication interface, so I2C must be used when using these modules.
In short, display modules that use I2C communication are usually selected when there is a need to optimize pin usage, connect multiple devices, simplify interfaces, etc. Special situations require specific treatment. Do you understand the choice of using I2C for display modules?
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