HD643303x Hitachi, HD643303x Datasheet - Page 243

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

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 all toggle when the counter is cleared.
For the settings and operation when reset-synchronized PWM mode and buffer mode are both
selected, see section 8.4.8, Buffering.
GRA3
GRB3
GRA4
GRB4
H'0000
TIOCA
TIOCB
TIOCA
TOCXA
TIOCB
TOCXB
TCNT3 value
Figure 8-32 Operation in Reset-Synchronized PWM Mode (Example)
3
3
4
4
4
4
(when OLS3 = OLS4 = 1)
Counter cleared at compare match with GRA3
228
Time