NEC V854 UPD703006 User Manual page 204

CHAPTER 7 TIMER/COUNTER FUNCTION (REAL-TIME PULSE UNIT)
(3) When timer is cleared (timer 0, timer 2, and timer 3)
Count clock
Value of timer
Internal coincidence clear
Compare register value
Coincidence detection
Notes 1. FFFFFEH for timer 0
2. FFFFFFH for timer 0
Remark When timer 0 or timer 1 is operated as a free running timer, the timer value is cleared to 0 when
the timer overflows.
Count clock
Value of timer
Overflow interrupt
Notes 1. FFFFFEH for timer 0
2. FFFFFFH for timer 0
204
Note 1 Note 2
FFFEH FFFFH
Note 1 Note 2
FFFFH
FFFEH
User's Manual U11969EJ3V0UM00
0 0
0000H
↑
Coincidence does not occur
0 1 2
1
3