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This lesson talks about the interrupt signal of the LCD screen touch circuit

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Common code names of interrupt signals in drawings are TP_INT_N and TS_INT_N

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Let's take Huawei mobile phones as an example to explain

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Open Xinzhizao intelligent query system and find the touch circuit

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LCD Interface is a display interface, of course it is also a touch connector

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Let's see which one is the interrupt signal

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First look for the TP code, TP is touch

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Look for INT, INT means interrupt, _N means active low

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GPIO_212_TP_INT_N is the touch interrupt signal

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This signal starts from pin 35 of the connector and goes straight to another chip

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It can be seen that it leads to the pin BC40 of a chip

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SOC means that this chip is actually the CPU

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Its location number is U300, and its model is Hi3680,

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which is HiSilicon's 3680 processor

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The interrupt signal leads to the BC40 pin of the CPU without any components in the line

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This is the line for the interrupt signal of the touch circuit

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That's all for this lesson