M16C Datasheet, PDF (110/262 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Preliminary Specifications REV.B
Specifications in this manual are tentative and subject to change.
Mitsubishi microcomputers
M16C / 6N Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timers’ functions for three-phase motor control
A carrier wave of sawtooth waveform
Carrier wave
Signal wave
Timer B2
Trigger signal for
timer Ai start
(timer B2 overflow
signal)
Interrupt occurres.
Rewriting the value of timer A4.
Interrupt occurres.
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
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 11-9. Timing chart of operation (4)
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