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SH7021 Datasheet(PDF) 295 Page - Renesas Technology Corp

Part # SH7021
Description  SuperH??RISC engine
PDF  509 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7021 Datasheet(HTML) 295 Page - Renesas Technology Corp

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RENESAS 279
CK
TIOC pin
Input
capture signal
TCNT
BR
GR
n
n + 1
N
N + 1
M
m
nn
N
MM
n
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
H' 1FFF
GRA3
H' 0999
H' 0000
BRB3
GRB3
TIOCA3
TIOCB3
H' 1FFF
H' 1FFF
Time
H' 0999
H' 0999
H' 1FFF
H' 0999
TCNT3
TCNT4
GRB3
H' 0999
H' 0999
Figure 10.52 Buffer Operation 4 (Complementary PWM Mode)



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