186
µ
PD78214 Sub-Series
Fig. 7-90 shows an example of PPG output using 8-bit timer 2 (TM2). Fig. 7-91 shows an example of PPG outputwhen CR20 = CR21. Fig. 7-92 shows an example of PPG output when CR20 = 00H.Fig. 7-90 Example of PPG Output Using TM2
Remark ALV2 = 0, ALV3 = 0
Table 7-18 PPG Output on TO2 (fCLK = 6 MHz)
Count clock
fCLK/16
fCLK/32
fCLK/64
fCLK/128
fCLK/256
fCLK/512
Minimum pulse widthNote
2.67
µ
s
5.33
µ
s
10.7
µ
s
21.3
µ
s
42.7
µ
s
85.3
µ
s
PPG period
5.33
µ
s to 683
µ
s
10.7
µ
s to 1.37 ms
21.3
µ
s to 2.73 ms
42.7
µ
s to 5.46 ms
85.3
µ
s to 10.9 ms
171
µ
s to 21.8 ms
PPG frequency
187.5 kHz to 1.46 kHz
93.75 kHz to 732 Hz
46.9 kHz to 366 Hz
23.4 kHz to 183 Hz
11.7 kHz to 91.6 Hz
5.86 kHz to 45.8 Hz
Note The case where CR20 = 0 is excluded.
CR21
INTC20
Count starts
CR21 CR21
CR20 CR20 CR20
INTC21
TO2
(PPG output)
TO3
(timer output)
Pulse period
Pulse
width
T
TM2
count value
0H