Toshiba TLCS-900/H1 Series Manual page 429

Original cmos 32-bit microcontroller

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Reset counter for debounce time

Start counter for debounce time

INT4 is generated by matching counter and

specified debounce time.

Figure 3.19.4 Timing Diagram of Debounce Circuit

After pen is released, INT4 can be issued again.

IINT4 is not generated by matching counter and specified debounce

period because it is an edge-type interrupt.

Tmp92ch21fg Jtmp92ch21