Timing After Compare Register Change During Timer Count Operation - NEC mPD780208 Subseries User Manual

CHAPTER 7 8-BIT TIMER/EVENT COUNTER
(3) Operation after compare register change during timer count operation
If the values after the 8-bit compare registers (CR10 and CR20) are changed are smaller than those of
the 8-bit timer registers (TM1 and TM2), TM1 and TM2 continue counting, overflow and then restart counting
from 0. Thus, if the value after CR10 and CR20 (M) change is smaller than that before the change (N),
it is necessary to restart the timer after changing CR10 and CR20.
Figure 7-16. Timing After Compare Register Change During Timer Count Operation
Count pulse
CR10, CR20 N M
X _ 1
TM1, TM2 count value X FFH 00H 01H 02H
Remark N > X > M
167
User's Manual U11302EJ4V0UM