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What is the module of the serial screen?
Edit:Shenzhen Koroli Electronic Technology Co., Ltd.   UpDate:2019-11-07

The serial port and parallel port are two hostile concepts, just like single lane and multiple lanes. Serial communication is the transfer of each byte of data to the other end of the data line in a bitwise manner. The parallel port, as the name implies, transmits data to the receiving end side by side, but it does not run multiple serial port protocols at the same time. In fact, the data transmission of the serial port is logically messy. Parallel port and serial port are completely different transmission methods. Generally speaking, for digital circuits, if a full-color 800*480 instant image reaches 30fps or above, data transmission is necessary to select parallel port communication. The data load of serial communication cannot be compared with parallel port. For example, the use of reversing images. Generally speaking, the design of the monochrome serial port screen will use IIC or TTL, and the interface selected by the colorful serial port screen will be very diverse, and the customized interface may be selected depending on the situation.

The serial device cannot carry the data amount of the parallel device, so most of the picture content and programs appearing are written in the module's memory, not in the EEPROM of the microcontroller.

Then the MCU sends the instruction set to the serial device for scheduling, for example, changing the content of the fixed text, revealing the hidden layer, moving the coordinates of a certain control, and adjusting the backlight power.

The advantage of the serial port screen is that the TFT module has a very complete graphic running environment. All the content of the display only needs to be scheduled, and the module can complete the calculation by itself, without requiring the MCU to display the content data frame by frame. Give the screen. This allows for more design options, both low-power MCUs and superior ARM. For a simple MCU like the 51 MCU, its operation is simple and simple. It only needs to respond to the suspension of the external device and then send the command to the TFT module. After that, the MCU does not need to care.

Category and direction

The use of serial port display devices is very extensive, whether it is monochrome or colorful, is a dot matrix method or a segment code method. These visualization devices can be found from the factory to each household. More colorful will be used in medical equipment and consumer electronics, including some exploration equipment and handheld instruments. The use of segmented LED or LCD readings to resolve analog sources has been used so far. In the future, the serial port display will be used in more industrial grade switches, detection, control products, medical beauty products, public safety and smart home products.