STA310 datasheet(74/90 Pages) STMICROELECTRONICS

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STA310

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KAR_DUET

Duet ON/OFF switch

Address: 0x8A

Type: R/W

Reset value: 0

Description:

The value in this register sets the duet function on or

off. When selected, the duet function is configured by

KAR_DUETTHRESH

Duet threshold control

Address + 0x8B

Type: R/W

Reset delay: 0

Description:

When the

Duet

function

enabled

by the

KAR_DUET register, this register specifies the ampli-

tude of the voice line below which the voice is can-

celled. If the amplitude of the voice line is below this

threshold, the recorded voice is played instead. The

value of DUETTHRESHOLD ranges from 0 to 255,

full scale signal.

KAR_VOICE

Selection of voice effects

Address: 0x8C

Type: R/W

Reset delay: 0x0

Description:

KAR_VDELAY

Programmable delay/decay music effects

Address: 0x8D

Type: R/W

Reset value: 0x0

Description:

The value in this register specifies the delay used for

voice input effects. The delay can be set in the range

from 0 to 2048/Fs seconds (where Fs is the sampling

frequency in KHz).

‘desired time delay’ = ( 2048 / Fs) * ( Value / 256)

which gives:

KAR_VDELAY value = (Fs / 8) * ’desired time delay

For reverberation effects, this register gives the de-

cay factor,which can vary within the range 0 to 1.0.

KAR_VBAL

Programmable mix for echo and chorus effects

Address: 0x8E

Type: R/W

Reset value: 0x3F

65432

Reserved

DUET

Bitfield

Description

DUET

0: duet off and 1: duet on

321

DUETTHRESHOLD[7:0]

6543

Reserved

MIX VOICEEFF[1:0

]

Bitfield

Description

VOICEEFF Selecte the voice effects:

0: No effect is applied to the voice input

1: Echo is applied to the voice inputs,

tuned by registers

KAR_VDELAY and

KAR_VBAL

2: Chorus is applied to the voice inputs,

tuned by registers

KAR_VDELAY and

KAR_VBAL

3: Reverb is applied to the voice inputs,

tuned by register

KAR_VDELAY.

MIX

Voice channel mixing:

0: No mix, voice is output on centre

channelt

1: Mix music and voice channels into music

channel.

321

Value

321

BALANCE[7:0]

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