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M16C/6N Group (M16C/6NK, M16C/6NM)
Sawtooth Waveform as a Carrier Wave
Sawtooth Wave
Signal Wave
Timer B2
Timer A4 Start
Trigger Signal
Timer A4 One-Shot
(1)
Pulse
U-Phase Output
(1)
Signal
U-Phase Output
(1)
Signal
U-Phase
INV14 = 0
("L" active)
U-Phase
U-Phase
INV14 = 1
("H" active)
U-Phase
INV14: Bits in the INVC1 register
NOTES:
1. Internal signals. See Figure 14.1 Three-Phase Motor Control Timer Functions Block Diagram.
The above applies to INVC0 = 01XX110Xb and INVC1 = 010XXX00b (X varies depending on each system.)
The examples of PWM output change are
- Default value of the IDB0 and IDB1 registers: DU0=0, DUB0=1, DU1=1, DUB1=1
They are changed to DU0=1, DUB0=0, DU1=1, DUB1=1 by the timer B2 interrupt.
Figure 14.10 Sawtooth Wave Modulation Operation
Rev.2.00
Nov 28, 2005
REJ09B0124-0200
(1)
Rewrite the IDB0
and IDB1 registers
page 148 of 378
14. Three-Phase Motor Control Timer Function
Transfer the counter to the
three-phase shift register
Dead time
Dead time
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