BU9414FV Datasheet, PDF(45/61 Page) Rohm

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BU9414FV Datasheet, PDF (45/61 Pages) Rohm – 32bit Audio DSP

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BU9414FV

Technical Note

4-28. About the automatic renewal of five coefficients of b0, b1, b2, a1 and a2 of Bi-quad Filter

BASS, MIDDLE, TREBLE, main output 7 bands Parametric Equalizer and sub output 3 band Parametric Equalizer have

used coefficient RAM. As for this coefficient RAM, because direct access is not possible from the micro-computer, it cannot

refresh the register efficiently.

There is an automatic renewal function of coefficient RAM in this DSP, the automatic write-in renewal of coefficient RAM is

possible by using this function. However when 4-26 ãthe function of direct setting a coefficient RAMã is utilized, it is not

possible to utilize automatic write-in renewal.

Selection of using the automatic write-in renewal function

Default = 0

Select Address

&h6D [ 0 ]

Value

Operating explanation

Automatic write-in renewal function is used

Automatic write-in renewal function is not used

The separate setting of Filter of automatic write-in renewal function

Default = 00h

Select Address

Filter

Operating explanation

&h6E [ 0 ]

BASS

0ï¼Automatic renewal function OFF