M16C62_M Datasheet, PDF (123/615 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

Timers’ functions for three-phase motor control
Mitsubishi microcomputers
M16C / 62A Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Assigning certain values to DU0 (bit 0 at 034A16) and DUB0 (bit 1 at 034A16), and to DU1 (bit 0 at 034B16)
and DUB1 (bit 1 at 034B16) allows the user to output the waveforms as shown in Figure 1.15.7, that is, to
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output the U phase alone, to fix U phase to “H”, to fix the U phase to “H,” or to output the U phase alone.
Carrier wave
Signal wave
Timer B2
Rewriting timer A4 every timer B2 interrupt occurs.
Trigger signal for
timer Ai start
(timer B2 overflow
signal)
Timer A4 output ^m
Timer B2 interrupt occurs.
Rewriting three-phase buffer register.
n
m
n
m
p
o
U phase
output signal
U phase
output signal
U phase
U phase
Dead time
Note: Set to triangular wave modulation mode and to three-phase mode 0.
Figure 1.15.7. Timing chart of operation (2)
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