UPD784938 Datasheet, PDF (336/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 11 TIMER/EVENT COUNTER 2
Figure 11-23. PWM Pulse Output (BW2 = 1)
TM2
count value
Count start
0H
CR20
Interrupt
FFFFH
CR20
FFFFH
FFFFH
CR20
TO2
Pulse width
Pulse cycle
Pulse width
Pulse cycle
Remark ALV2 = 0
Table 11-8. TO2/TO3 PWM Cycle (fXX = 12.58 MHz, BW2 = 1)
Count Clock
fXX/4
fXX/8
fXX/16
fXX/32
fXX/64
fXX/128
fXX/256
fXX/512
fXX/1,024
Minimum Pulse Width [µs]
0.32
0.64
1.27
2.54
5.09
10.17
20.35
40.70
81.40
PWM Cycle [s]
0.02
0.04
0.08
0.17
0.33
0.67
1.33
2.67
5.33
PWM Frequency [Hz]
47.6
23.8
12.0
6.0
3.0
1.5
0.7
0.4
0.2
336
Preliminary User’s Manual U13987EJ1V0UM00