325
13.1 Overview of Remote Control Generator
s 6-bit PPG Function (when a 1/8/32 tinst clock selected for count clock cycle)
Because the cycle and "H" pulse width of its output waveform can be set separately, the remote
control generator can be used as a 6-bit PPG. The duty ratio is from 1.6% to 100%. The valid
range of "H" pulse width comparison settings, however, is from "1" to the cycle comparison
setting. This means that the lower the cycle comparison setting (the shorter the cycle of the
output waveform), the lower the resolution (the larger the minimum duty ratio step size).
For a cycle comparison setting of "2", for example, the possible "H" pulse width comparison
settings would be "1", and "2", which would result in a resolution of 1/2. The duty ratios for
these settings would be 50%, and 100%, or a minimum duty ratio step of 50%.
Output cycle
= cycle comparison value × selected count clock cycle
Duty ratio (%) = ("H" pulse width compare value/cycle compare value) × 100
Table 13.1-3 "6-Bit PPG Resolution and Output Cycles (0.5 tinst count clock)" shows the
available output cycle, resolution and the minimum steps for duty ratio.
*:
Steady "H" output when "H" pulse width comparison value is equal to period
comparsion value.
Table 13.1-3 6-Bit PPG Resolution and Output Cycles (0.5 tinst count clock)
Cycle
comparison
value
"H" pulse
width
comparison
value setting
range
Output cycle (Count clock)
Resolution
Duty ratio
Minimum
step
1 tinst
8 tinst
32 tinst
0
Prohibited setting
Output "H"
11
2
1 to 2
2 tinst
16 tinst
64 tinst
1/2
50.0%*
3
1 to 3
3 tinst
24 tinst
96 tinst
1/3
33.3%*
4
1 to 4
4 tinst
32 tinst
128 tinst
1/4
25.0%*
5
1 to 5
5 tinst
40 tinst
160 tinst
1/5
20.2%*
6
1 to 6
6 tinst
48 tinst
192 tinst
1/6
16.7%*
7
1 to 7
7 tinst
56 tinst
224 tinst
1/7
14.3%*
8
1 to 8
8 tinst
64 tinst
256 tinst
1/8
12.5%*
9
1 to 9
9 tinst
72 tinst
288 tinst
1/9
11.1%*
10
1 to 10
10 tinst
80 tinst
320 tinst
1/10
10.0%*
:
15
1 to 15
15 tinst
120 tinst
480 tinst
1/15
6.7%*
:
20
1 to 20
20 tinst
160 tinst
640 tinst
1/20
5.0%*
:
25
1 to 25
25 tinst
200 tinst
800 tinst
1/25
4.0%*