NEC PD78214 - Manual (Page 175)

146
µ
PD78214 Sub-Series
(c) When the value of TM1 is FFH
Count clock
TM1
Cleared by software
OVF1
OVF1 ←0
FEH FFH 0H 1H
(2) Clear operation
After a coincidence with a compare register (CR1m: m = 0, 1) or capture operation, 8-bit timer 1 (TM1) can be
automatically cleared. If a TM1 clear cause occurs, TM1 is cleared to 00H by the next count clock pulse. This
means that even if a TM1 clear cause occurs, TM1 holds the value existing at that time until the next count
clock pulse is applied.
Fig. 7-48 TM1 Cleared by a Coincidence with Compare Register (CR1m)
Count clock
Compare register
(CR1m)
(m=0,1)
TM1 n-1 n 0 1
Coincidence between
TM1 and CR1m
Cleared here
n