m30262f8gp Renesas Electronics Corporation., m30262f8gp Datasheet - Page 106
m30262f8gp
Manufacturer Part Number
m30262f8gp
Description
Renesas 16-bit Cmos Single-chip Microcomputer M16c Family / M16c/20 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M30262F8GP.pdf
(239 pages)
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Three-Phase Motor Control Timer Function
100
Figure 1.14.7 shows the block diagram for three-phase PWM output mode. When selecting output polar-
ity “L” active in three-phase PWM output mode, the positive-phase waveforms (U phase, V phase, and W
phase) and negative waveforms (U phase, V phase, and W phase), six waveforms in total, are output
from P8
controls the U phase and U phase, timer A1 controls the V phase and V phase, and timer A2 controls the
W phase and W phase respectively; timer B2 controls the periods of one-shot pulse output from timers
A4, A1, and A2.
In outputting a waveform, dead time can be set so as to cause the “L” level of the positive waveform
output (U phase, V phase, and W phase) not to lap over the “L” level of the negative waveform output (U
phase, V phase, and W phase).
To set short circuit time, use three 8-bit timers sharing the reload register for setting dead time. A value
from 1 through 255 can be set as the count of the timer for setting dead time. The timer for setting dead
time works as a one-shot timer. If a value is written to the dead time timer (034C
to the reload register shared by the three timers for setting dead time.
Any of the timers for setting dead time takes the value of the reload register into its counter, if a start
trigger comes from its corresponding timer, and performs a down count in line with the clock source
selected by the dead time timer count source select bit (bit 2 at 0349
trigger again before the workings due to the previous trigger are completed. In this instance, the timer
performs a down count from the reload register’s content after its transfer, provoked by the trigger, to the
timer for setting dead time.
Since the timer for setting dead time works as a one-shot timer, it starts outputting pulses if a trigger comes;
it stops outputting pulses as soon as its content becomes 00
The positive waveforms (U phase, V phase, and W phase) and the negative waveforms (U phase, V
phase, and W phase) in three-phase PWM output mode are output from respective ports by means of
setting “1” in the output control bit (bit 3 at 0348
of set by port direction register. This bit can be set to “0” not only by use of the applicable instruction, but
by entering a falling edge in the NMI terminal or by resetting. Also, if “1” is set in the positive and negative
phases concurrent L output disable function enable bit (bit 4 at 0348
phase and U phase, V phase and V phase, and W phase and W phase concurrently go to “L”, as a result,
the port becomes the state of set by port direction register.
0
, P8
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
1
, P7
2
, P7
3
, P7
4
, and P7
Renesas Technology Corp.
5
as active on the “L” level. Of the timers used in this mode, timer A4
16
). Setting “0” in this bit causes the ports to be the state
16
, and waits for the next trigger to come.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
16
16
). The timer can receive another
) causes one of the pairs of U
16
), the value is written
M16C/26 Group
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