Tm1 Cleared After Capture Operations; Sample Applications - NEC PD78212 User Manual

TM1
count value
0H
INTP0
pin input
INTP0
interrupt request
Capture/compare
register (CR11)

7.2.6 Sample Applications

(1) Interval timer operation (1)
By free running 8-bit timer 1 (TM1), and adding a value to a compare register (CR10, CR11) in an interrupt
handling routine, 8-bit timer/counter 1 can be used as an interval timer whose period is as long as the added
value. (See Fig. 7-55.)
In addition, 8-bit timer 1 (TM1) has two compare registers, so that interval timers with two types of periods
can be produced.
Fig. 7-56 shows the setting of control registers. Fig. 7-57 shows the setting procedure. Fig. 7-58 shows
interrupt handling.
Fig. 7-54 TM1 Cleared after Capture Operations
N1
N2
Captured Captured
N1 N2
Remark D : TM1 count value (n = 0, 1, 2, ...)
n
CLR10 = 0, CLR11 = 0, CM = 1
Chapter 7 Timer/Counter Units
N3
Captured
N3
N4
N5
Captured Captured
N4
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