STA326
Table 34. RAM Block for Biquads, Mixing, and Scaling
Index (Decimal)
Index (Hex)
00h
01h
02h
03h
04h
05h
…
Coefficient
C1H10 (b1/2)
C1H11 (b2)
C1H12 (a1/2)
C1H13 (a2)
C1H14 (b0/2)
C1H20
Default
000000h
000000h
000000h
000000h
400000h
000000h
…
0
Channel 1 – Biquad 1
1
2
3
4
5
Channel 1 – Biquad 2
…
…
19
20
21
…
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
…
13h
14h
15h
…
Channel 1 – Biquad 4
Channel 2 – Biquad 1
C1H44
400000h
000000h
000000h
…
C2H10
C2H11
…
…
27h
28h
29h
2Ah
2Bh
2Ch
2Dh
2Eh
2Fh
30h
31h
32h
33h
34h
35h
36h
37h
38h
39h
3Ah
3Bh
3Ch
3Dh
3Eh
3Fh
Channel 2 – Biquad 4
C2H44
400000h
000000h
000000h
000000h
000000h
400000h
000000h
000000h
000000h
000000h
400000h
7FFFFFh
7FFFFFh
7FFFFFh
7FFFFFh
7FFFFFh
5A9DF7h
7FFFFFh
000000h
000000h
7FFFFFh
400000h
400000h
High-Pass 2nd Order Filter
For XO = 000
C12H0 (b1/2)
C12H1 (b2)
C12H2 (a1/2)
C12H3 (a2)
C12H4 (b0/2)
C12L0 (b1/2)
C12L1 (b2)
C12L2 (a1/2)
C12L3 (a2)
C12L4 (b0/2)
C1PreS
Low-Pass 2nd Order Filter
For XO = 000
Channel 1 – Pre-Scale
Channel 2 – Pre-Scale
Channel 1 – Post-Scale
Channel 2 – Post-Scale
Channel 3 – Post-Scale
Thermal Warning – Post Scale
Channel 1 – Mix 1
Channel 1 – Mix 2
Channel 2 – Mix 1
Channel 2 – Mix 2
Channel 3 – Mix 1
Channel 3 – Mix 2
UNUSED
C2PreS
C1PstS
C2PstS
C3PstS
TWPstS
C1MX1
C1MX2
C2MX1
C2MX2
C3MX1
C3MX2
UNUSED
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STMICROELECTRONICS [ ST ]
