M16C62P_06 Datasheet, PDF (190/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
16. Three-Phase Motor Control Timer Function
Sawtooth Waveform as a Carrier Wave
Sawtooth Wave
Signal Wave
Timer B2
Timer A4 Start
Trigger Signal⁽¹⁾
Timer A4 One-Shot
Pulse⁽¹⁾
U-Phase Output
Signal⁽¹⁾
U-Phase Output
Signal⁽¹⁾
INV14 = 0
(“L” active)
U-Phase
U-Phase
Rewrite the IDB0 and IDB1
registers
Transfer the counter to the three-
phase shift register
Dead time
INV14 = 1
(“H” active)
U-Phase
U-Phase
Dead time
INV14: Bits in the INVC1 register
NOTES:
1. Internal signals. See Figure 16.1 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 16.10 Sawtooth Wave Modulation Operation
Rev.2.41 Jan 10, 2006 Page 175 of 390
REJ09B0185-0241