HD64F3039F18 Datasheet, PDF (273/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 8 16-Bit Integrated Timer Unit (ITU)
8.4.5 Reset-Synchronized PWM Mode
In reset-synchronized PWM mode channels 3 and 4 are combined to produce three pairs of
complementary PWM waveforms, all having one waveform transition point in common.
When reset-synchronized PWM mode is selected TIOCA₃, TIOCB₃, TIOCA₄, TOCXA₄, TIOCB₄,
and TOCXB₄ automatically become PWM output pins, and TCNT₃ functions as an up-counter.
Table 8.5 lists the PWM output pins. Table 8.6 summarizes the register settings.
Table 8.5 Output Pins in Reset-Synchronized PWM Mode
Channel
3
4
Output Pin
TIOCA
3
TIOCB
3
TIOCA₄
TOCXA₄
TIOCB
4
TOCXB
4
Description
PWM output 1
PWM output 1' (complementary waveform to PWM output 1)
PWM output 2
PWM output 2' (complementary waveform to PWM output 2)
PWM output 3
PWM output 3' (complementary waveform to PWM output 3)
Table 8.6 Register Settings in Reset-Synchronized PWM Mode
Register
TCNT3
TCNT4
GRA3
GRB3
GRA4
GRB4
Setting
Initially set to H'0000
Not used (operates independently)
Specifies the count period of TCNT3
Specifies a transition point of PWM waveforms output from TIOCA and TIOCB
3
3
Specifies a transition point of PWM waveforms output from TIOCA and TOCXA
4
4
Specifies a transition point of PWM waveforms output from TIOCB and TOCXB
4
4
Rev.3.00 Mar. 26, 2007 Page 249 of 682
REJ09B0353-0300