M16C26 Datasheet, PDF (109/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative
Three-Phase Motor Control Timer Function
and
subject to change.
SINGLE-CHIP 16-BIT
M16C/26 Group
CMOS MICROCOMPUTER
waveform, which has the opposite phase of the U phase waveform, are the same as in generating a U
phase waveform. In this way, a waveform can be picked up from the applicable terminal in a manner in
which the “L” level of the U phase waveform doesn’t lap over that of the U phase waveform, which has the
opposite phase of the U phase waveform. The width of the “L” level too can be adjusted by varying the
values of timer B2, timer A4, and timer A4-1. In dealing with the V and W phases, and V and W phases,
the latter are of opposite phase of the former, have the corresponding timers work similarly to dealing with
the U and U phases to generate an intended waveform.
Carrier wave
Signal wave
Timer B2
Trigger signal for
timer Ai start
(timer B2 overflow
signal)
Timber B2 interrupt occurres
Rewriting timer A4 and timer A4-1.
Possible to set the number of overflows to generate an
interrupt by use of the interrupt occurrences frequency
set circuit
Timer A4 output
m
n
m
n
m
p
o
Control signal for
timer A4 reload
U phase
output signal
U phase
output signal
(Note 1)
U phase
U phase
Dead time
(Note 2)
U phase
U phase
Dead time
INV13(Triangular wave
modulation detect flag)
(Note 3)
Note 1: When INV14="0" (output wave Low active)
Note 2: When INV14="1" (output wave High active)
Note 3: Set to triangular wave modulation mode and to three-phase mode 1.
Figure 1.14.8. Timing chart of operation (1)
Renesas Technology Corp.
The three-phase
shift register
shifts in
synchronization
with the falling
edge of the A4
output.
103