STA308A View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STA308A' PDF : 63 Pages View PDF
Equalization and mixing
8
Equalization and mixing
Figure 8. Channel mixer
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
CxMIX1
CxMIX2
CxMIX3
CxMIX4
CxMIX5
CxMIX6
CxMIX7
CxMIX8
STA308A
Channel x
8.1
Post-scale
The STA308A provides one additional multiplication after the last interpolation stage and
before the distortion compensation on each channel. This is a 24-bit signed fractional
multiply.
The scale factor for this multiply is loaded into RAM using the same I2C registers as the
biquad coefficients and the bass-management.
This post-scale factor can be used in conjunction with an ADC equipped micro-controller to
perform power-supply error correction. All channels can use the channel 1 by setting the
post-scale link bit.
Table 9. RAM block for biquads, mixing, and bass management
Index
(decimal)
Index
(hex)
Coefficient
0
0x00
Channel 1 - Biquad 1
C1H10 (b1/2)
1
0x01
C1H11 (b2)
2
0x02
C1H12 (a1/2)
3
0x03
C1H13 (a2)
Default
0x000000
0x000000
0x000000
0x000000
56/63
Share Link: 
