7906 datasheet(214/531 Pages) RENESAS

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THREE-PHASE WAVEFORM MODE

7906 Group User’s Manual Rev.2.0

10-9

10.2 Block description

10.2.3 Three-phase output data register 0

Figure 10.2.6 shows the structure of the three-phase output data register 0 (the three-phase waveform

mode).

For bits 7 and 6, refer to section “10.2.2 Dead-time timer.”

Fig. 10.2.6 Structure of three-phase output data register 0 (three-phase waveform mode)

(1) W-phase output fix bit (bit 0)

Setting of this bit to “1” fixes the output level at the W-phase waveform output pin to the level which

is selected by the W-phase fixed output’s polarity set bit (bit 0 at address A916); vice versa, the output

level at the W-phase waveform output pin is reversed.

(2) V-phase output fix bit (bit 1)

Setting of this bit to “1” fixes the output level at the V-phase waveform output pin to the level which

is selected by the V-phase fixed output’s polarity set bit (bit 1 at address A916); vice versa, the output

level at the V-phase waveform output pin is reversed.

(3) U-phase output fix bit (bit 2)

Setting of this bit to “1” fixes the output level at the U-phase waveform output pin to the level which

is selected by the U-phase fixed output’s polarity set bit (bit 2 at address A916); vice versa, the output

level at the U-phase waveform output pin is reversed.

(4) W-phase output polarity set buffer (bit 3)

This bit serves as the buffer to set the W-phase output polarity and is used in three-phase mode 0.

(Refer to section “10.2.9 Output polarity set toggle flip-flop.”)

Three-phase output data register 0 (Address A816)

b7 b6 b5 b4 b3 b2 b1 b0

X X

X: It may be either “0” or “1.”

Note: This bit is invalid in three-phase mode 1.

0 0 : f2

0 1 : f2/2

1 0 : f2/4

1 1 : Do not select.

W-phase output fix bit

V-phase output fix bit

U-phase output fix bit

W-phase output polarity set buffer

(Valid in three-phase mode 0.)

(Note)

Clock-source-of-dead-time-timer

select bits

Bit name

Bit

5, 4

Function

At reset

R/W

0 : Released from output fixation

1 : Output fixed

0 : Released from output fixation

1 : Output fixed

0 : Released from output fixation

1 : Output fixed

b7 b6

0 : “H” output

1 : “L” output

Invalid in the three-phase waveform mode.

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