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STA308 View Datasheet(PDF) - STMicroelectronics

Part NameDescriptionManufacturer
STA308 MULTICHANNEL DIGITAL AUDIO PROCESSOR WITH DDX™ ST-Microelectronics
STMicroelectronics ST-Microelectronics
STA308 Datasheet PDF : 33 Pages
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STA308
The Clock Output Select register selects the frequency of the clock output pin relative to the PLL clock output.
The PLL clock runs at 2048fs for 32, 44.1, and 48kHz, at 1024fs for 88.2kHz and 96 kHz, and at 512fs for
176.4kHz and 192kHz.
COS(1,0)
01
10
11
CKOUT Frequency
PLL Output/4
PLL Output/8
PLL Output/16
3.3.3 Post-Scale Link
BIT R/W RST NAME
DESCRIPTION
6 R/W 0
PSL Post-Scale Link :0 – Each Channel uses individual Post-Scale value
1 - Each Channel uses Channel 1 Post-Scale value
For multi-channel applications, the post-scale values can be linked to the value of channel 1 for ease of use and
update the values faster.
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
DCV
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
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