HD643303x Hitachi, HD643303x Datasheet - Page 249

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

In complementary PWM mode, TCNT3 and TCNT4 overshoot and undershoot at the transitions
between up-counting and down-counting. The setting conditions for the IMFA bit in channel 3
and the OVF bit in channel 4 differ from the usual conditions. In buffered operation the buffer
transfer conditions also differ. Timing diagrams are shown in figures 8-37 and 8-38.
Buffer transfer
signal (BR to GR)
TCNT3
GRA3
IMFA
GR
Figure 8-37 Overshoot Timing
N – 1
Buffer transfer
N
234
Set to 1
N
N + 1
N
Flag not set
No buffer transfer
N – 1