STA339BWS datasheet(70/79 Pages) STMICROELECTRONICS

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STA339BWS

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When filters from 5th to 7th are configured as user-programmable, the corresponding

coefficients are stored respectively in addresses 0x14-0x18 (BQ5), 0x19-0x1D (BQ6) and

0x1E-0x22 (BQ7) as in Table 72 on page 61.

Note:

BQx bits are ignored if BQL = 0 or if DEMP = 1 (relevant for BQ5) or CxTCB = 1 (relevant for

BQ6 and BQ7).

7.14

Soft volume configuration registers (addr 0x37 - 0x38)

Soft volume update has a fixed rate by default. Using register 0x37 and 0x38 it is possible to

override the default behavior allowing different volume change rates.

It is also possible to independently define the fade-in (volume is increased) and fade-out

(volume is decreased) rates according to the desired behavior.

Table 80. Bit BQ5 description

BQ5

Mode

Preset de-emphasis filter selected

User defined biquad 5 coefficients are selected

Table 81. Bit BQ6 description

BQ6

Mode

Preset bass filter selected as per Table 65

User defined biquad 6 coefficients are selected

Table 82. Bit BQ7 description

BQ7

Mode

Preset treble filter selected as per Table 65

User defined biquad 7 coefficients are selected

Reserved

SVUPE

SVUP[4]

SVUP[3]

SVUP[2]

SVUP[1]

SVUP[0]

Reserved

SVDWE

SVDW4]

SVDW[3]

SVDW[2]

SVDW[1]

SVDW[0]

Table 83. Bit SVUPE description

SVUPE

Mode

When volume is increased, use the default rate

When volume is increased, use the rates defined by SVUP[4:0]

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