HD643303x Hitachi, HD643303x Datasheet - Page 262

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

Figure 8-53 shows an example in which GRB3 is buffered by BRB3 in complementary PWM
mode. Buffering is used to set GRB3 to a higher value than GRA3, generating a PWM waveform
with 0% duty cycle. The BRB3 value is transferred to GRB3 when TCNT3 matches GRA3, and
when TCNT4 underflows.
H'1FFF
GRA3
H'0999
H'0000
BRB3
GRB3
TIOCA3
TIOCB3
Figure 8-53 Register Buffering (Example 4: Buffering in Complementary PWM Mode)
TCNT3 and
TCNT4 values
H'0999
H'0999
H'0999
TCNT3
TCNT4
H'1FFF
H'1FFF
247
H'1FFF
H'0999
H'0999
GRB3
Time