MAS3587F datasheet(45/82 Pages) MICRONAS

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ADVANCE INFORMATION

MAS 3587F

Micronas

00 15

Treble

bit[15:8]

Treble range

60hex

+12 dB

58hex

+11 dB

...

08hex

+1dB

00hex

0dB

F8hex

−1dB

...

A8hex

−11 dB

A0hex

−12 dB

Higher resolution is possible, one LSB step results in a gain step of about

1/8 dB.

With positive treble settings, clipping of the output signal may occur. There-

fore, it is not recommended to set treble to a value that, in conjunction with

loudness and volume, would result in an overall positive gain.

The settings require: max (bass, treble) + loudness + volume

≤ 0dB

bit[7:0]

Not used, must be set to 0

TREBLE

00 1E

Loudness

bit[15:8]

Loudness Gain

44hex

+17 dB

40hex

+16 dB

...

04hex

+1dB

00hex

0dB

bit[7:0]

Loudness Mode

00hex

normal (constant volume at 1 kHz)

04hex

Super Bass (constant volume at 2 kHz)

Higher resolution of Loudness Gain is possible: An LSB step results in a gain

step of about 1/4 dB.

Loudness increases the volume of low- and high-frequency signals, while

keeping the amplitude of the 1-kHz reference frequency constant. The

intended loudness has to be set according to the actual volume setting.

Because loudness introduces gain, it is not recommended to set loudness to a

value that, in conjunction with volume, would result in an overall positive gain.

The settings should be: max (bass, treble) + loudness + volume

≤ 0dB

The corner frequency for bass amplification can be set to two different values.

In Super Bass mode, the corner frequency is shifted up. The point of constant

volume is shifted from 1 kHz to 2 kHz.

LDNESS

Table 3–12: Codec control registers on I2C subaddress 6Chex

Address

(hex)

Function

Name

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