STA30813TR STMicroelectronics, STA30813TR Datasheet - Page 16

• Manufacturer Part Number: STA30813TR
• Description: IC PROCESSOR AUD DGTL DDX 64TQFP
• Manufacturer: STMicroelectronics
• Series: DDX™r
• Type: Audio Processorr

Specifications of STA30813TR

• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Other names: 497-3946-2

STA308
3.3.4 Biquad Coefficient Link
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)
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.
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.
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.
The STA308 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.
16/33
BIT
BIT
BIT
BIT
BIT
1
7
2
3
4
5
0
NAME
RST
BIT
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RST
RST
1
RES
0
RST
D7
0
0
RST
RST
0
0
0
0
VOLEN
NAME
NAME
BQL
NAME
DEMP
SAOFB
NAME
D6
MIXE
0
NAME
SAO0
SAO1
SAO2
Biquad Link :
0 – Each Channel uses coefficient values
1- Each Channel uses Channel 1 coefficient values
Volume Enable: 0 – Volume Operation Bypassed
Deemphasis : 0 – No Deemphasis, 1- Deemphasis
Mix Enable: 0 – Normal Operation
SAO2
D5
0
Serial Audio Output Interface Format : Determines the interface
format of the output serial digital audio interface.
1 - Volume Operation Normal
1 - Adjacent Channel Mix Mode
SAO1
D4
0
DESCRIPTION
DESCRIPTION
SAO0
DESCRIPTION
DESCRIPTION
D3
0
DESCRIPTION
DEMP
D2
0
VOLEN
D1
1
MIXE
D0
0