HD6473032F16 Datasheet, PDF (384/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 10 16-Bit Integrated Timer Unit (ITU)
Figure 10.30 shows examples of the output of PWM waveforms with duty cycles of 0% and
100%. If the counter is cleared by compare match with GRB, and GRA is set to a higher value
than GRB, the duty cycle is 0%. If the counter is cleared by compare match with GRA, and GRB
is set to a higher value than GRA, the duty cycle is 100%.
TCNT value
GRB
Counter cleared by compare match with GRB
GRA
H'0000
Time
TIOCA
TCNT value
GRA
Write to GRA
Write to GRA
a. 0% duty cycle
Counter cleared by compare match with GRA
GRB
H'0000
Time
TIOCA
Write to GRB
Write to GRB
b. 100% duty cycle
Figure 10.30 PWM Mode (Example 2)
Rev. 3.00 Mar 21, 2006 page 354 of 814
REJ09B0302-0300