STA306 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STA306' PDF : 33 Pages View PDF
STA306
3.3.4 Biquad Coefficient Link
BIT R/W RST NAME
DESCRIPTION
7
R/W
0
BQL
Biquad Link :
0 – Each Channel uses coefficient values
1- Each Channel uses Channel 1 coefficient values
For ease of use, all channels can use the biquad coefficients loaded into the Channel 1 Coefficient RAM space
by setting the BQL bit to 1. Then any EQ updates would only have to be performed once.
3.4 Configuration Register E (address 04h)
BIT
D7
D6
D5
NAME
RES
SAOFB
SAO2
RST
0
0
0
D4
SAO1
0
D3
SAO0
0
D2
DEMP
0
D1
VOLEN
1
D0
MIXE
0
BIT
R/W
RST NAME
DESCRIPTION
0
R/W
0
MIXE Mix Enable: 0 – Normal Operation
1 - Adjacent Channel Mix Mode
The scale and mix functionality can be used to mix adjacent channels instead of for bass management. By set-
ting this bit(BME must be set to 0) odd channels will be mixed with their adjacent even channel and output in
the place of the even channel. The odd channel wills pass-through unscaled. The values used for this function
are the same as for bass management. Since this function occurs post channel mapping a large number of
possibilities are present for two channel mixing. Up to four mixed channels can be obtained.
BIT R/W RST NAME
DESCRIPTION
1 R/W
1
VOLEN Volume Enable: 0 – Volume Operation Bypassed
1 - Volume Operation Normal
When VOLEN set to 1, volume operation is normal. When set to 0, volume operation is bypassed and the vol-
ume stages are all set to pass-through. This also eliminates the digital volume offset of ~-0.6dB that is used to
map full-scale digital input to full DDX modulation output.
BIT R/W RST NAME
DESCRIPTION
2
R/W
0
DEMP Deemphasis : 0 – No Deemphasis, 1- Deemphasis
By setting this bit to one deemphasis will implemented on all channels. When this is used it takes the place of
biquad #1 in each channel and any coefficients using biquad #1 will be ignored. DSPB(DSP Bypass) bit must
be set to 0 for Deemphasis to function.
BIT
R/W
RST
NAME
3
R/W
0
SAO0
4
R/W
0
SAO1
5
R/W
0
SAO2
DESCRIPTION
Serial Audio Output Interface Format : Determines the interface
format of the output serial digital audio interface.
The STA306 features a configurable digital serial audio interface. The settings of the SAIx bits determine how
the output to this interface is interpreted. Six formats are accepted.
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