Figure 12.4-2 Underflow Operation Timing - Fujitsu MB91F109 FR30 Hardware Manual

CHAPTER 12 16-BIT RELOAD TIMER
Count clock
Counter
Data loading
Underflow setting
Count clock
Counter
Underflow set
288

Figure 12.4-2 Underflow Operation Timing

0000 Reload data
H
(RELD=1)
0000 FFFF
H
(RELD=0)
-1
H
-1
-1