Interval Times - NEC PD78076 User Manual

(2) Interval timer mode
Interrupt requests are generated at the preset time intervals.
Interval Time
2 11 x 1/f
XX
2 12 x 1/f
XX
13
2 x 1/f
XX
14
2 x 1/f
XX
15
2 x 1/f
XX
16
2 x 1/f
XX
2 17 x 1/f
XX
2 19 x 1/f
XX
Remarks 1. f
XX
2. f
X
3. MCS : Bit 0 of oscillation mode selection register (OSMS)
4. Figures in parentheses apply to operation with f
276
CHAPTER 12 WATCHDOG TIMER
Table 12-2. Interval Times
MCS = 1
2 11 x 1/f (410 s)
X
2 12 x 1/f (819 s)
X
13
2 x 1/f (1.64 ms)
X
14
2 x 1/f (3.28 ms)
X
15
2 x 1/f (6.55 ms)
X
16
2 x 1/f (13.1 ms)
X
2 17 x 1/f (26.2 ms)
X
2 19 x 1/f (104.9 ms)
X
: Main system clock frequency (f
: Main system clock oscillation frequency
MCS = 0
2 12 x 1/f (819 s)
X
2 13 x 1/f (1.64 ms)
X
14
2 x 1/f (3.28 ms)
X
15
2 x 1/f (6.55 ms)
X
16
2 x 1/f (13.1 ms)
X
17
2 x 1/f (26.2 ms)
X
2 18 x 1/f (52.4 ms)
X
2 20 x 1/f (209.7 ms)
X
or f /2)
X X
= 5.0 MHz.
X