GT915L is a capacitive touch – screen controller chip designed by Goodix Technology. It is mainly used in mobile phones, tablets and other touch – screen devices. The following is a description of its functions:
Touch Sensing
• Multi – Point Touch: It supports 5 – point touch, which can accurately recognize the position and movement of multiple fingers on the touch screen, enabling users to perform complex operations such as pinch – to – zoom and multi – finger gestures.
• High – Precision Sensing: With 26 driving channels and 14 sensing channels, it can achieve high – precision touch position detection, providing users with a sensitive and accurate touch – screen operation experience.
Signal Processing
• Noise Filtering: It has a built – in noise – filtering circuit that can effectively suppress various interference signals in the environment, improving the signal – to – noise ratio of the touch – screen sensor and ensuring the stability and accuracy of touch – screen detection.
• Data Conversion: It can convert the analog signals collected by the touch – screen sensor into digital signals and perform digital signal processing to transmit the processed data to the host processor.
Power Management
• Low – Power Consumption: It adopts advanced power – saving technologies such as sleep mode and dynamic frequency adjustment. When the touch screen is not in use, the chip can automatically enter a low – power – consumption sleep mode to reduce power consumption and extend the battery life of the device.
Interface Communication
• SPI Interface: It uses the SPI interface to communicate with the host processor, featuring high – speed data transmission and good compatibility, which can meet the communication requirements between the chip and different types of host processors.
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