m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 239

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

THREE-PHASE WAVEFORM MODE
10.3 Three-phase mode 0
10-22
10.3.2 Operation in three-phase wave mode 0
Figure 10.3.4 shows a triangular wave modulation output example (three-phase mode 0), and Figure 10.3.5
shows a saw-tooth-wave modulation output example (three-phase mode 0)
Repeat procedures from
Figure 10.3.6 shows the triangular wave modulation output model (for one period), and Figure 10.3.7
shows the saw-tooth-wave modulation output model (for one period).
simultaneously, the one-shot pulse outputs of timer A0 through A2 are started. Also, the contents of
the output polarity set buffer of each phase are transferred to the output polarity set toggle flip-flop.
shot pulse output of timer A0/A1/A2. Simultaneously, the one-shot pulse of the dead-time timer is
output.
In the case of the saw-tooth-wave modulation output, the one-shot pulse of the dead-time timer is
output. Also, each of the positive and negative waveform outputs is not allowed to become “L” level
from “H” level until the reversed signal of the one-shot pulse output of the dead-time timer rises.
Each of the positive and negative waveform outputs is not allowed to become “L” level from “H” level
until the reversed signal of the one-shot pulse output of the dead-time timer rises.
counter again, be sure to write the next data to the output polarity set buffer of each phase.
The contents of the output polarity set toggle flip-flop are reversed at each falling edge of the one
In the case of the triangular wave modulation output, before an underflow occurs in the timer A3
When an underflow occurs in the timer A3 counter, a timer A3 interrupt request is generated;
through
7905 Group User’s Manual Rev.1.0
for the three-phase waveform output control.