Renesas M16C/60 Series Hardware Manual page 146

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M16C/6N5 Group
Carrier wave: sawtooth waveform
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
* Internal signals. See the block diagram of the three-phase motor control timer function.
Shown here is a typical waveform for the case where INVC0 = 01XX110X
An example for changing PWM outputs is shown below.
Initial values of IDB0 and IDB1 registers: DU0 = 0, DUB0 = 1, DU1 = 1, DUB1 = 1.
The register values are changed to DU0 = 1, DUB0 = 0, DU1 = 1, DUB1 = 1 a timer B2 interrupt occurs.
Figure 1.14.10 Sawtooth Wave Modulation Operation
Rev.1.00 2003.05.30 page 132
Rewriting IDB0, IDB1 registers
Dead time
Dead time
(X = set as suitable for the system) and INVC1 = 010XXX00
2
Three-phase Motor Control Timer Function
Transfer to three-phase
output shift register
.
2