NEC 78K0 User Manual page 144

Figure 6-21. Timing of Pulse Width Measurement Operation with Free-Running Counter
t
Count clock
0000H
TM00 count value
TI000 pin input
CR010 capture value
INTTM010
TI010 pin input
CR000 capture value
INTTM000
OVF00
Note Clear OVF00 by software.
144
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
(with Both Edges Specified)
0001H D0 D0 + 1
D0
(D1 − D0) × t
User's Manual U16227EJ2V0UD
D1 D1 + 1 FFFFH 0000H
D1
D1
(10000H − D1 + D2) × t
(10000H − D1 + (D2 + 1)) × t
D2 D2 + 1 D2 + 2 D3
D2
D2 + 1
Note
(D3 − D2) × t