M16C80 Datasheet, PDF (133/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
15. Three-phase motor control timers’ functions
A carrier wave of sawtooth waveform
Carrier wave
Signal wave
Timer B2
Trigger signal for
timer Ai start
(timer B2 overflow
signal)
Timer A4 output
m
U phase output
signal
U phase
output signal
U phase
U phase
Interrupt occurres.
Rewriting the value of timer A4.
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.
The three-phase
n
o
p
shift register
shifts in
synchronization
with the falling
edge of timer A4.
Dead time
Note: Set to sawtooth modulation mode and to three-phase mode 0.
Figure 15.8 Timing chart of operation (3)
Rev.1.00 Aug. 02, 2005 ^{Page 122} of 329
REJ09B0187-0100