參數(shù)資料
型號： M37753M8C-XXXHP
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 40 MHz, MICROCONTROLLER, PQFP80
封裝： PLASTIC, QFP-80
文件頁數(shù)： 44/110頁
文件大?。?/td> 1439K
代理商： M37753M8C-XXXHP
MITSUBISHI MICROCOMPUTERS
M37753M8C-XXXFP, M37753M8C-XXXHP
M37753S4CFP, M37753S4CHP
38
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Three-phase mode 0
In selecting three-phase waveform mode, three-phase mode 0 is se-
lected by setting bit 4 of the waveform output mode register (address
1A16) to “0”.
The output polarity of three-phase waveform depends on the output
polarity set toggle flip-flop. The positive waveform of the three-phase
waveform is “H” output when the toggle flip-flop is “0”; it is “L” output
when the toggle flip-flop is “1”. (Three-phase waveform is output as
a negative waveform.)
Each output polarity set toggle flip-flop has the output polarity set
buffer shown in Figure 44. When the timer B2’s counter contents be-
come 000016, the contents of output polarity set buffer are set into
the output polarity set toggle flip-flop. After that, the polarity of the
contents of output polarity set toggle flip-flop are reversed each time
completion of one-shot pulse of timer (timers A2 to A0) correspond-
ing to each phase.
Figure 45 shows an example of U-phase waveform and the output
operation is explained. Three-phase mode 0 becomes valid when
writing “0” to the U-phase output polarity set buffer (bit 1 at address
1C16) and actuating the timer B2. When the counter of timer B2 be-
comes 000016, the timer B2 interrupt request signal occurs and the
timer A2 simultaneously starts one-shot pulse output. At this time,
the contents of U-phase output polarity set buffer, “0” in this case, are
set into the output polarity set toggle flip-flop 2.
When the one-shot pulse output of timer A2 is completed, the con-
tents of output polarity set toggle flip-flop 2 is reversed from “0” to “1”.
Simultaneously, the one-shot pulse of the 8-bit dead-time timer is
output for ensuring time not to overlap “L” levels of U phase wave-
form and its negative U phase waveform.
The U-phase waveform output keeps “H” level from the start until the
one-shot pulse output of the dead-time timer is completed, even if
the contents of output polarity set toggle flip-flop 2 are reversed from
“0” to “1” owing to the timer A2’s one-shot pulse output. When the
one-shot pulse output of the dead-time timer is completed, “1” of
output polarity set toggle flip-flop 2 which has been reversed be-
comes valid and the U phase waveform changes to “L” level.
Signal output each time
Timer B2 becomes 000016
One-shot pulse output
with timer A2
Contents of output polarity
set toggle flip-flop 2
Reversed
pulse
output
signal with dead-time timer
U-phase waveform output
Then, write “1” to the U-phase output polarity set buffer (bit 1 at ad-
dress 1C16) before the counter of timer B2 becomes 000016.
After that, when the counter of timer B2 becomes 000016, the timer
A2 starts one-shot pulse output. Simultaneously, the contents of U-
phase output polarity set buffer, “1” in this case, are set into the out-
put polarity set toggle flip-flop 2 and the U phase waveform remains
“L” level.
When the one-shot pulse output of timer A2 is completed, the con-
tents of output polarity set toggle flip-flop 2 is reversed from “1” to “0”.
Simultaneously, the one-shot pulse output of the dead-time timer
starts.
When the contents of output polarity set toggle flip-flop 2 are re-
versed from “1” to “0”, the U-phase waveform changes its output level
from “L” to “H” without waiting for completion of the one-shot pulse
output of the dead-time timer.
U-phase waveform is generated by repeating the operation above.
The way to generate U-phase waveform, which is the negative phase
of U-phase, is the same as that for U-phase waveform except that
the contents of output polarity set toggle flip-flop 2 are treated as the
reversed signal from the case of U-phase waveform.
In this way, U-phase waveform and U-phase waveform, having the
negative phase of U-phase, are output from the pins so that their “L”
levels do not overlap each other. The width of “L” level can be also
modified by changing the value of timer B2 or timer A2.
V-, W-phase waveform and V-, W-phase waveform, having their
negative phase, are similarly output according to the corresponding
timer operation.
The explanation above is an example of three-phase waveform gen-
erating due to an triangular wave modulation. Three-phase waveform
due to a saw-tooth-wave modulation can also be generated by fixing
each beginning level of phases.
Fig. 45 U-phase waveform output example in three-phase mode 0 (triangular wave modulation)
相關(guān)PDF資料
PDF描述
M37753S4CHP 16-BIT, 40 MHz, MICROCONTROLLER, PQFP80
M37753M8C-XXXFP 16-BIT, MROM, 40 MHz, MICROCONTROLLER, PQFP80
M37753S4CFP 16-BIT, 40 MHz, MICROCONTROLLER, PQFP80
M37753S4CFP 16-BIT, 40 MHz, MICROCONTROLLER, PQFP80
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