THREE-PHASE WAVEFORM MODE
10.4 Three-phase mode 1
Carrier wave
Timer A0/A1/A2/A3 count start bit
Timer A3 interrupt request
Timer A3 underflow signal ✕2
✕1
✕1
✕1
✕1
✕1
✕1
Contents of timer A0/A1/A2
register
n1
n2
n3
n4
n5
n6
Contents of timer A0
register
1/A11/A21
One-shot pulse output of
timer A0/A1/A2
✕2
1/f
i
1/f
i
1/f
i
1/fi ✕ n1
1/f
i
✕ n
1
1/fi ✕ n3
✕
n
2
✕
n
4
✕
n
5
Rever-
sed
Reversed
Reversed
Rever-
sed
Rever-
sed
Rever-
sed
Contents of three-phase
output polarity set buffer
Transferred
Rever-
Transferred
Transferred
Transferred
Trans-
ferred
Trans-
ferred
Rever-
sed
Rever-
sed
Rever-
sed
Contents of output polarity
set toggle flip-flop
Undefined
✕2
✕2
sed
Reversed signal of pulse
output of dead-time timer
Undefined
Positive waveform output
Negative waveform output
Undefined
✕1 : Written by software
✕2 : This is an internal signal, which cannot be read from the external.
fi : Count source of timer A0/A1/A2
This applies under the following conditions:
• Timer A3 interrupt request: every second time
• Timer A3 interrupt validity output: even-numbered underflow in time A3
Fig. 10.4.5 Output example at start of three-phase mode 1
7905 Group User’s Manual Rev.1.0
10-33
RENESAS [ RENESAS TECHNOLOGY CORP ]
