HD64F3039F18 Datasheet, PDF (275/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 8 16-Bit Integrated Timer Unit (ITU)
Example of Reset-Synchronized PWM Mode
Figure 8.32 shows an example of operation in reset-synchronized PWM mode. TCNT3 operates as
an up-counter in this mode. TCNT4 operates independently, detached from GRA4 and GRB4.
When TCNT3 matches GRA3, TCNT3 is cleared and resumes counting from H'0000. The PWM
outputs toggle at compare match with GRB3, GRA4, GRB4, and TCNT3 respectively, and when
the counter is cleared.
TCNT3 value
GRA3
GRB3
GRA4
GRB4
H'0000
Counter cleared at compare match with GRA3
Time
TIOCA₃
TIOCB₃
TIOCA₄
TOCXA₄
TIOCB₄
TOCXB₄
Figure 8.32 Operation in Reset-Synchronized PWM Mode (Example)
(when OLS3 = OLS4 = 1)
For the settings and operation when reset-synchronized PWM mode and buffer mode are both
selected, see section 8.4.8, Buffering.
Rev.3.00 Mar. 26, 2007 Page 251 of 682
REJ09B0353-0300