Datasheet

12. Timer
page 127
923fo7002,51.beF00.2.veR
0020-2020B90JER
)T62/C61M,B62/C61M,A62/C61M(puorGA62/C61M
Timer B2
U phase
Carrier wave
Signal wave
U phase
output signal *
U phase
U phase
output signal *
U phase
U phase
INV14 = 0
Carrier wave: sawtooth waveform
INV14 = 1
Transfer to three-phase
output shift register
Rewriting IDB0, IDB1 registers
* 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
2 (X = set as suitable for the
system) and INVC1 = 010XXX00
2. 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.
Start trigger signal
for timer A4*
Timer A4
one-shot pulse*
Dead time
Dead time
(“H” active)
(“L” active)
Figure 12.3.10. Sawtooth Wave Modulation Operation