Renesas F-ZTAT H8 Series Hardware Manual page 385

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Example of Reset-Synchronized PWM Mode: Figure 10.32 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 of TCNT3 with
GRB3, GRA4, and GRB4 respectively, and all toggle when the counter is cleared.
TCNT3 value
GRA3
GRB3
GRA4
GRB4
H'0000
TIOCA
3
TIOCB
3
TIOCA
4
TOCXA
4
TIOCB
4
TOCXB
4
Figure 10.32 Operation in Reset-Synchronized PWM Mode (Example)
For the settings and operation when reset-synchronized PWM mode and buffer mode are both
selected, see section 10.4.8, Buffering.
Section 10 16-Bit Integrated Timer Unit (ITU)
Counter cleared at compare match with GRA3
(when OLS3 = OLS4 = 1)
Rev. 3.00 Mar 21, 2006 page 357 of 814
Time
REJ09B0302-0300

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