Touch chip and data acquisition method thereof

Abstract

The invention provides a touch control chip and a data acquisition method thereof. The touch control chip includes: N induction pins for receiving an induction signal on a touch control screen; M analog detection channels which are coupled to M induction pin selection switches in a one-to-one corresponding manner, wherein each induction pin selection switch is selectively coupled to one or more induction pins and is used for selecting one induction pin to establish a connection with the corresponding analog detection channel during a clock period, and 1<=M<N; an ADC unit which is coupled to the M analog detection channels and is used for converting the induction signal received by the M analog detection channels into a digital signal; and a data storage device which is coupled to the ADC unit, includes storage units which are corresponding to the N induction pins one to one, and is used for storing the digital signal converted and generated by the ADC unit. According to the touch control chip and the data acquisition method, the total area of the touch control chip can be effectively reduced, and the production cost of the touch control chip can be reduced.

Description

technical field [0001] The invention relates to the field of touch chips, in particular to a touch chip and a data collection method thereof. Background technique [0002] In today's increasingly intense consumer system-on-chip (SOC) market, chip cost has become one of the key factors that determine the success or failure of a product. Capacitive touch technology has been developed rapidly due to its good support for multi-point touch, wear resistance of the touch screen, and long service life, and its products have been widely used. [0003] As a bridge between the user and the mobile phone, the touch chip needs to accurately obtain the coordinates of the user's click on the screen. In the prior art, the sensing signal is received through the sensing pin on the touch chip, the received sensing signal is input into the analog detection channel, and the sensing signal is converted into a digital signal by an analog-to-digital conversion (ADC) unit, and stored in the touch sc...

AI Technical Summary

Problems solved by technology

[0005] However, as the screen size of touch devices increases, the number of sensing pins corresponding to the touch chip, the number of analog detection channels, and ADC units also increase accordingly, resulting in an increase in the total area of ​​the touch chip. High production cost of touch chip

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