Renesas M16C FAMILY series Hardware Manual page 152

M 1 6 C 2 / 8 G o r u p ( M 1 6 C
Sawtooth Waveform as a Carrier Wave
Signal wave
Timer B2
Start trigger signal
for timer A4
Timer A4
one-shot pulse
U phase
output signal
U phase
output signal
U phase
INV14 = 0
("L" active)
U phase
U phase
INV14 = 1
("H" active)
U phase
NOTE:
1. Internal signals. See Figure 12.25.
The above applies under the following conditions:
INVC0 = 01XX110X
Examples of PWM output change are:
• Default value of registers IDB0 and IDB1: DU0=0, DUB0=1, DU1=1, DUB1=1.
They are changed to DU0=1, DUB0=0, DU1=1, DUB1=1 when the timer B2 interrupt is generated.
Figure 12.34 Sawtooth Wave Modulation Operation
R e . v 2 0 . 0 J a . n 3 , 1 2 0 0 7
R E J 0 9 B 0 0 4 7 0 - 2 0 0
2 / , 8 M 1 6 C 2 / 8 ) B
Sawtooth wave
(1)
(1)
(1)
(1)
(X varies depending on each system) and INVC1 = 010XXX00
2
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f o 3 8 5
Rewrite registers
Transfer the values to the three-
IDB0 and IDB1
phase output shift register
Dead time
Dead time
.
2
12. Timer