SH7020 Datasheet, PDF (295/509 Pages) Renesas Technology Corp – SuperH™ RISC engine

CK
TIOC pin
Input
capture signal
TCNT
GR
BR
n
M
n
mM
n+1
N
N+1
n
N
Mn
Figure 10.51 Input Capture Timing Example for Buffer Operation
An example of buffer operation in the complementary PWM mode between GRB3 and BRB3 is as
shown in figure 10.52. By making GRB3 larger than GRA3 using the buffer operation, a PWM
waveform with a duty cycle of 0% is generated. The transfer from BRB–GRB occurs upon
TCNT3 and GRA compare match and TCNT4 underflow.
TCNT3 and TCNT4 values
TCNT3
H' 1FFF
GRA3
GRB3
H' 0999
TCNT4
H' 0000
BRB3
H' 0999
GRB3 H' 0999
H' 1FFF
H' 0999
H' 1FFF
H' 0999
Time
H' 1FFF
H' 0999
TIOCA3
TIOCB3
Figure 10.52 Buffer Operation 4 (Complementary PWM Mode)
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