16-Bit Timer/Event Counter Mode - NEC PD78056F User Manual

9.1.2 16-bit timer/event counter mode

(1) 16-bit interval timer
Interrupt requests can be generated at the preset time intervals.
Table 9-3. Interval Times When 8-Bit Timer/Event Counters
Minimum Interval Time
MCS = 1 MCS = 0
2 1/f 2
X
(400 ns) (800 ns)
2
2 1/f 2
X
(800 ns)
3
2 1/f 2
X
(1.6 s)
4
2 1/f 2
X
(3.2 s)
5
2 1/f 2
X
(6.4 s) (12.8 s)
6
2 1/f 2
X
(12.8 s) (25.6 s)
7
2 1/f 2
X
(25.6 s) (51.2 s)
8
2 1/f 2
X
(51.2 s) (102.4 s)
9
2 1/f 2
X
(102.4 s) (204.8 s)
11
2 1/f 2
X
(409.6 s) (819.2 s)
Remarks 1. f
X
2. MCS : Bit0 of oscillation mode selection register (OSMS)
3. Values in parentheses when operated at f
214
CHAPTER 9 8-BIT TIMER/EVENT COUNTERS
are Used as 16-Bit Timer/Event Counter
Maximum Interval Time
MCS = 1
2 17
1/f 2 1/f
X X
(26.2 ms)
3 18
1/f 2 1/f
X X
(1.6 s) (52.4 ms)
4 19
1/f 2 1/f
X X
(3.2 s) (104.9 ms)
5 20
1/f 2 1/f
X X
(6.4 s) (209.7 ms)
6 21
1/f 2 1/f
X X
(419.4 ms)
7 22
1/f 2 1/f
X X
(838.9 ms)
8 23
1/f 2 1/f
X X
(1.7 s)
9 24
1/f 2 1/f
X X
(3.4 s)
10 25
1/f 2 1/f
X X
(6.7 s)
12 27
1/f 2 1/f
X X
(26.8 s)
: Main system clock oscillation frequency
Resolution
MCS = 0 MCS = 1
18
2 1/f 2 1/f
X X
(52.4 ms) (400 ns)
19 2
2 1/f 2 1/f
X X
(104.9 ms) (800 ns)
20 3
2 1/f 2 1/f
X X
(209.7 ms) (1.6 s)
21 4
2 1/f 2 1/f
X X
(419.4 ms) (3.2 s)
22 5
2 1/f 2 1/f
X X
(838.9 ms) (6.4 s)
23 6
2 1/f 2 1/f
X X
(1.7 s) (12.8 s)
24 7
2 1/f 2 1/f
X X
(3.4 s) (25.6 s)
25 8
2 1/f 2 1/f
X X
(6.7 s) (51.2 s)
26 9
2 1/f 2 1/f
X X
(13.4 s) (102.4 s)
28 11
2 1/f 2 1/f
X
(53.7 s) (409.6 s)
= 5.0 MHz.
X
MCS = 0
2
2 1/f
X
(800 ns)
3
2 1/f
X
(1.6 s)
4
2 1/f
X
(3.2 s)
5
2 1/f
X
(6.4 s)
6
2 1/f
X
(12.8 s)
7
2 1/f
X
(25.6 s)
8
2 1/f
X
(51.2 s)
9
2 1/f
X
(102.4 s)
10
2 1/f
X
(204.8 s)
12
2 1/f
X X
(819.2 s)