NEC PD78F9488 - Manual (Page 138)

CHAPTER 7 8-BIT TIMERS 50, 60, AND 61
User’s Manual U15331EJ4V1UD
138
Figure 7-15. Timing of Interval Timer Operation with 8-Bit Resolution
(When CRnm Changes from N to M (N > M))
Count clock
CRnm
TCEnm
INTTMnm
TOnm
TMnm 00H 00H 00H N − 1 N M N M
N M
00H FFH M
H
Clear Clear Clear
TMnm overflows
because M < N
CRnm overwritten
Remark 00H
≤ M < N ≤ FFH
nm = 50, 60, 61