m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 233
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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10.2 Block description
THREE-PHASE WAVEFORM MODE
Table 10.2.2 Relationship between contents of output polarity set toggle flip-flop and output level
Fig. 10.2.13 Operations of output polarity set buffer and output polarity set toggle flip-flop
10-16
10.2.9 Output polarity set toggle flip-flop
The output polarity set toggle flip-flops 0 through 2 are used to control the output polarity of the positive
and negative phases of the three-phase waveform.
In three-phase mode 0, values are set into the U-, V-, W-phase output polarity set buffer (bits 5 and 4 at
address A9
In three-phase mode 1, a value is set into the three-phase output polarity set buffer (bit 3 at address A6
These bits are transferred to the output polarity set toggle flip-flop at an underflow of timer A3.
The contents of the output polarity set toggle flip-flop are reversed at the end of the timer A0/A1/A2 one-
shot pulse.
Table 10.2.2 lists the relationship between the contents of the output polarity set toggle flip-flop and the
output level, and Figure 10.2.13 shows the operations of the output polarity set buffer and output polarity
set toggle flip-flop.
Contents of output polarity set toggle flip-flop
Internal
signals
16
Timer A3 underflow signal
Contents of U-phase output
polarity set buffer
Contents of output polarity
set toggle-flip flop 2
Timer A2 one-shot pulse
and bit 3 at address A8
0
1
7905 Group User’s Manual Rev.1.0
16
).
From buffer
1
0
1
0
Output level of positive phase Output level of negative phase
Trans-
ferred
Reversed
H
L
Trans-
ferred
Reversed
Trans-
ferred
Reversed
H
L
Trans-
ferred
Reversed
16
).
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