M61523FP

Rev.1.00, Sep.04.2003, page 13 of 23

Soft-Changing

This IC built in the Soft-changing circuit for reduce the step-noise when internal SW changing.

By this function, Switching noise of no-signal and some signals can be reduced.

At the Time of Volume and Fader Changing

The Soft-changing of Volume and Fader can work as follows,

(1) At the time of Soft-changing (VOL, FAD) ON

(2) Volume : At the time of changing in the 1dB or 2dB step.

Fader : At the time of changing in the 2dB step.

(3) After the last Soft-changing (VOL, FAD) is completed.

Soft-changing time (VOL, FAD) can be select for four kinds of the bottom table.

(Ex.)

volume

0dB

Volume code

-1dB input

Soft-changing(VOL)=ON

volume

-1dB

t

t: Soft-changing time (You can changed by serial DATA.)

Note) Serial DATA isn’t accepted during Soft-changing.

Soft Switching Time (Vol)

Time

D0

D1

60ms

1

1

40ms

1

0

20ms

0

1

5ms

0

0

Soft Switching Time (Fad)

Time

D2

D3

100ms

1

1

80ms

1

0

60ms

0

1

40ms

0

0