M30280F6HP RENESAS [Renesas Technology Corp], M30280F6HP Datasheet - Page 151

• Manufacturer Part Number: M30280F6HP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES
• Manufacturer: RENESAS [Renesas Technology Corp]

M
R
R
1
e
E
Figure 12.33 Triangular Wave Modulation Operation
. v
6
J
The three-phase motor control timer function is enabled by setting the INV02 bit in the INVC0 register to “1”.
When this function is on, timer B2 is used to control the carrier wave, and timers A4, A1 and A2 are used to
control three-phase PWM outputs (U, U, V, V, W and W). The dead time is controlled by a dedicated dead-
time timer. Figure 12.33 shows the example of triangular modulation waveform, and Figure 12.34 shows
the example of sawtooth modulation waveform.
C
0
2
9
2 /
0 .
B
8
0
0
INV14 = 0
Examples of PWM output change are:
INV14 = 1
The above applies under the following conditions:
TB2S bit in the
TABSR register
Start trigger signal
for timer A4
Timer A4
one-shot pulse
The value written to registers TA4 and TA41 becomes effective at the rising edge of the timer A1 reload control signal.
INV13
(INV11=1(three-phase
NOTE:
0
mode 1))
(“L” active)
(1)When INV11 = 1 (three-phase mode 1)
(“H” active)
G
4
· INV01 = 0 and ICTB2 = 2
· Default value of the timer: TA41 = m, TA4 = m.
· Default values of registers IDB0 and IDB1:
J
1. Internal signals. See Figure 12.25.
INVC0 = 00XX11XX
7
Triangular waveform as a Carrier Wave
a
o r
or INV01 = 1, INV00 = 1, and ICTB2=1
Registers TA4 and TA41 are changed whenever the timer B2
DU0 = 1, DUB0 = 0, DU1 = 0, DUB1 = 1.
They are changed to DU0 = 1, DUB0 = 0, DU1= 1 and DUB1 = 0
every two times the timer B2 underflows),
generated at the falling edge of the timer A1 reload control signal.)
interrupt is generated.
when the third timer B2 interrupt is generated.
0 -
First time, TA41 = n, TA4 = n. Second time, TA41 = p, TA4 = p.
. n
u
2
p
3
0
U phase
output signal
, 1
(1)
U phase
output signal
0
(
M
Timer B2
2
(1)
1
0
U phase
U phase
U phase
U phase
0
6
Triangular wave
7
C
2 /
Signal wave
2
(1)
(1)
(X varies depending on each system) and INVC1 = 010XXXX0
, 8
page 131
M
16
(the timer B2 interrupt is generated
1
6
C
2 /
f o
8
16
3
) B
m
8
(the timer B2 interrupt is
5
__
m
___
n
___
(2)When INV11 = 0 (three-phase mode 0)
· INV01 = 0, ICTB2 = 1
· Default value of the timer: TA4 = m. The TA4 register is changed
· Default values of registers IDB0 and IDB1:
First time: TA4 = m. Second tim:, TA4 = n.
Third time: TA4 = n. Fourth time: TA4 = p.
Fifth time: TA4 = p.
DU0 = 1, DUB0 = 0, DU1 = 0, DUB1 = 1.
They are changed to DU0 = 1, DUB0 = 0, DU1 = 1, and DUB1 = 0
whenever timer B2 underflows)
whenever the timer B2 interrupt is generated.
when the sixth timer B2 interrupt is generated.
n
Dead time
2
.
Dead time
16
p
(the timer B2 interrupt is generated
p
Rewrite registers IDB0 and IDB1
Transfer the values
to the three-phase
output shift register
12. Timer