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Hello everyone, today we are going to learn about the touchpad of the laptop

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The laptop's touchpad is often abbreviated to TP

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It is an input device widely used in laptops

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and consists of a touch chip, soft wire and keys

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It replaces the mouse on the desktop

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In the architecture, the touchpad is managed by the EC through the PS/2 bus

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It is also connected to the PCH through the I2C bus to identify the hardware ID

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For example, in this architecture,

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the PCH identifies the identity information of the touchpad through the I2C bus,

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that is, the hardware ID

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Its touch signal through touch IC conversion, through PS/2 bus and EC communication

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Common faults of the touchpad include:

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no response to touch, cursor jumping, or inefficiency

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Failure to respond to touch is usually caused by damaged touch IC

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or inadequate working conditions

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Okay, this is the introduction of the laptop touchpad