M16C62_M Datasheet, PDF (126/615 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

Timers’ functions for three-phase motor control
A carrier wave of sawtooth waveform
Carrier wave
Signal wave
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer B2
Trigger signal for
timer Ai start
(timer B2 overflow
signal)
Interrupt occurs.
Rewriting the value of timer A4.
Interrupt occurs.
Rewriting the value of timer A4.
Rewriting three-phase
output buffer register
Data transfer is made from the three-
phase buffer register to the three-
phase shift register in step with the
timing of the timer B overflow.
Timer A4 output
m
n
U phase
output signal
U phase
output signal
U phase
The three-phase
shift register shifts
o
p
in synchronization
with the falling
edge of timer A4.
U phase
Dead time
Note: Set to sawtooth modulation mode and to three-phase mode 0.
Figure 1.15.9. Timing chart of operation (4)
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