STA308 STMicroelectronics, STA308 Datasheet - Page 30

• Manufacturer Part Number: STA308
• Description: IC AUDIO PROCESSOR DGTL 64-TQFP
• Manufacturer: STMicroelectronics
• Series: DDX™r
• Type: Audio Processorr

Specifications of STA308

• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -

STA308
Post-Scale
The STA308 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. All chan-
nels can use the channel 1 by setting the post-scale link bit.
RAM Block for Biquads and Bass Management:
30/33
0
1
2
3
4
5
…
24
25
26
…
45
…
49
50
…
199
200
201
202
…
207
208
209
…
215
216
217
…
223
224
…
255
(Decimal)
Index
Index
(Hex)
CAh
CFh
DFh
1Ah
2Dh
C7h
C8h
C9h
D0h
D1h
D7h
D8h
D9h
FFh
00h
01h
02h
03h
04h
05h
18h
19h
31h
32h
F0h
…
…
…
…
…
…
…
…
Channel 1 - Biquad 1
Channel 1 - Biquad 2
…
Channel 1 - Biquad 5
Channel 2 - Biquad 1
…
Distortion Compensation
…
Channel 2 - Biquad 5
Channel 3 - Biquad 1
…
Channel 8 - Biquad 5
Channel 1 - Pre-Scale
Channel 2 – Pre-Scale
Channel 3 – Pre-Scale
…
Channel 8 –Pre-Scale
Channel 1 – BassM Scale
Channel 2 – BassM Scale
…
Channel 8 – BassM Scale
Channel 1 – Post-Scale
Channel 2 – Post-Scale
…
Channel 8 – Post-Scale
Not Used
…
Not Used
C1H10(b
C1H11(b0/2)
C1H12(a2)
C1H13(a1/2)
C1H14(b1/2)
C1H20
…
C1H54
C2H10
C2H11
…
DCC 23…0
…
C2H54
C3H10
…
C8H54
C1PS
C2PS
C3PS
…
C8PS
C1BMS
C2BMS
…
C8BMS
C1PS
C2PS
…
C8PS
…
Coefficient
2)
000000h
3FFFFFh
000000h
000000h
000000h
000000h
…
000000h
000000h
3FFFFFh
…
000000h
…
000000h
000000h
…
000000h
800000h
800000h
800000h
…
800000h
000000h
000000h
…
000000h
800000h
800000h
…
800000h
…
Default