THREE-PHASE WAVEFORM MODE
10.1 Overview
Timer A3
underflow signal
Three-phase mode 0
: Saw-tooth-wave
modulation
Timer A3
interrupt request signal
Timer A2
one-shot pulse output
Phase U
Phase U
By software at each timer A3 interrupt,
• Data is written to timer A2.
Timer A3
interrupt request signal
Three-phase mode 0
: Triangular wave
modulation
Timer A2
one-shot pulse output
Phase U
Phase U
By software at each timer A3 interrupt,
• Waveform output polarity is reversed.
• Data is written to timer A2.
Timer A3
interrupt request signal
Contets of
timer A2
register
Contets of
timer A2
register
Three-phase mode 1
: Triangular wave
modulation
Timer A2
one-shot pulse output
Contets of
Contets of
timer A2
register
1
timer A2
register
1
Phase U
Phase U
By software at each timer A3 interrupt,
• Data is written to timer A2 register.
• Data is written to timer A21 register.
Waveform output polarity is reversed
by hardware.
Note: This applies when a timer A3 interrupt request occurs at each second timer A3 underflow.
Fig. 10.1.1 Comparison of waveforms in three-phase mode 0 and 1
7906 Group User’s Manual Rev.2.0
10-3
RENESAS [ RENESAS TECHNOLOGY CORP ]
