The TFT display screen of the MCU interface is generally equipped with a "TE" signal interface. tft lcd module，The TE signal is an output interface. Generally, the application can provide normal display without connecting to the MCU.
TE (Tearing Effect Signal) is the feedback signal from the TFT controller to the MCU. The function is similar to the FLM (First Line Marker) signal of the previous monochrome LCD module.
The TE signal is sent from the TFT controller to tell the MCU that it is now "start" to read the RAM from the first line and display it. The goal is to avoid conflicts caused by the MCU writing data to the same location when the TFT controller reads RAM data. This conflict often causes the display of the screen to be blurred.
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