M32C80 Datasheet, PDF (185/352 Pages) Renesas Technology Corp – 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES

M32C/80 Group
Sawtooth Waveform as a Carrier Wave
Sawtooth Wave
Signal Wave
15. Three-Phase Motor Control Timer Functions
Timer B2
Timer A4 Start
Trigger Signal⁽¹⁾
Timer A4
One-Shot Pulse⁽¹⁾
UO-uPtphuatsSeignal₍₁₎
UO-uPtphuatsSeignal₍₁₎
INV14 = 0
("L" active)
U-Phase
U-Phase
Rewrite the IDB0 and IDB1 registers
Transfer the register values to
the three-phase shift register
Dead time
INV14 = 1
("H" active)
U-Phase
U-Phase
Dead time
INV14: Bits in the INVC1 register
NOTE:
1. Internal signals. See Figure 15.1.
The above applies when INVC0 = 01XX110X2 and INVC1 = 000XXX002 (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 15.9 Sawtooth Wave Modulation Operation
Rev. 1.00 Nov. 01, 2005 Page 166 of 330
REJ09B0271-0100