AN3245

Hardware

Doc ID 17747 Rev 1

11/19

Figure 10.

Three simultaneous key presses with ghost key event

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Three simultaneous key presses without ghost key event

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STMPE1801 stores and reports the 3 keys data

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System host reads key coordinates that do not form a 90° corner of a rectangle.

System host should recognize the key data as valid

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For implementation of a function with 3 simultaneous key presses (e.g. <Ctrl> +

<Alt> + <Del>) the user should avoid choosing key coordinates that can possibly

result in a ghost key event

Figure 11.

Three simultaneous key presses without ghost key event