The Difference Between Serial Port And Parallel Port LCD Module

In daily work, it is often asked what is the difference between serial liquid crystal and parallel port liquid crystal? Let's take a look from these aspects: internal structure: the parallel port LCD module is mainly composed of: liquid crystal display controller, parallel port controller, SDRAM controller, etc., under the control of the clock chip, the data transmitted by the parallel port is temporarily stored, that is, what content is displayed.

The internal structure of the serial liquid crystal module is relatively complex than that of the parallel port, which mainly includes: liquid crystal display controller, SDRAM controller serial communication controller, FLASH controller, bus controller and so on.

The serial liquid crystal module is a serial port that accepts the instructions sent by the host computer, and then performs the corresponding display operation after translation. The content that needs to be displayed is stored in FLASH, and can be displayed directly after receiving instructions. Write point speed: liquid crystal displays are ultimately determined by each pixel, so the manufacturing structure determines their write point speed.

The speed of the parallel port structure varies with the speed of the host computer. The writing speed of the serial port LCD module is mainly determined by the baud rate of the serial port. Use: Parallel port liquid crystal module is generally mostly used in the interface is simple, fast, high-speed graphics, real-time data instruments, serial port liquid crystal module is generally mostly used in the interface complex, display a wide range of products.

Cost: The price of parallel port is generally cheaper than the serial port. In summary, the parallel port is simple, fast, low cost, and the serial port interface is complex and the display content is wide.