MAS3519F datasheet(52/92 Pages) MICRONAS

52 / 92 page

MAS 35x9F

DATA SHEET

June 30, 2004; 6251-505-1DS

Micronas

3.4.4. Basic MB Configuration

With the parameters described in Table 3–16, the Mic-

ronas Bass system (MB) can be customized to create

different bass effects, as well as to fit the MB to various

loudspeaker characteristics. The easiest way to find a

good set of parameter is by selecting one of the set-

tings below, listening to music with strong bass content

and adjusting the MB parameters:

– MB_STR: Increase/decrease the strength of the MB

effect

– MB_HAR: Increase/decrease the content of low fre-

quency harmonics

– MB_FC: Shift the MB effect to lower/higher frequen-

cies

– MB_SHAPE: Widen/narrow MB frequency range

(which results in a softer/harder bass sound), turn

on/off the MB

Fig. 3–5: Micronas Bass (MB): Bass boost in relation

to input signal level

Table 3–17: Codec status registers on I2C subaddress 6D

hex

Address

(hex)

Function

Name

INPUT QUASI-PEAK

00 0A

A/D Converter Quasi-Peak Detector Readout Left

bit[14:0]

positive 15-bit value, linear scale

0000

2000

25% (

−12 dBFS)

4000

50% (

−6 dBFS)

7FFF

100% (0 dBFS)

QPEAK_L

00 0B

A/D Converter Quasi-Peak Detector Readout Right

bit[14:0]

positive 15-bit value, linear scale

0000

2000

25% (

−12 dBFS)

4000

50% (

−6 dBFS)

7FFF

100% (0 dBFS)

QPEAK_R

OUTPUT QUASI-PEAK

00 0C

Audio Processing Input Quasi-Peak Detector Readout Left

bit[14:0]

positive 15-bit value, linear scale

DQPEAK_L

00 0D

Audio Processing Input Quasi-Peak Detector Readout Right

bit[14:0]

positive 15-bit value, linear scale

DQPEAK_R

Frequency

MB_FC

MB_SHAPE

Table 3–18: Suggested MB settings

Function

MB_STR

(22hex)

MB_HAR

(23hex)

MB_FC

(24hex)

MB_SHAPE

(21hex)

MB off

xxxxhex

xx00hex

Low end headphones, medium effect

5000hex

3000hex

0600hex

0902hex

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