Toshiba H1 Series Data Book page 570

P96/INT4 pin
Reset the counter for de-bounce time
INT4
Start the counter for de-bounce time
de-bounce time
INT4 is generated by matching counter and
specified de-bounce time.
INT4 isn't generated by matching counter and specified
de-bounce time because of it is an edge-type interrupt.
Figure 3.20.4 Timing diagram of de-bounce circuit
de-bounce time
After pen is de-touched, INT4 can be issued
again.
92CZ26A-567
TMP92CZ26A
de-bounce time