STA335BWS View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STA335BWS Datasheet PDF : 68 Pages
| |||
Register description
STA335BWS
6.12.21
Over-current post-scale
The STA335BWS provides a simple mechanism for reacting to over-current detection in the
power-block. When the OCWARN input is asserted, the over-current post-scale value is
used in place of the normal post-scale value to provide output attenuation on all channels.
The default setting provides 3 dB of output attenuation when OCWARN is asserted.
The amount of attenuation to be applied in this situation can be adjusted by modifying the
over-current post-scale value. As with the normal post-scale, this scaling value is a 24-bit
signed fractional multiplier, with 0x800000 = -1 and 0x7FFFFF = 0.9999998808. By default,
the over-current post-scale factor is set to 0x5A9DF7. Once the over-current attenuation is
applied, it remains until the device is reset.
Table 31. RAM block for biquads, mixing, scaling and bass management
Index (Decimal) Index (Hex)
Coefficient
Default
0
0x00
1
0x01
C1H10(b1/2)
C1H11(b2)
0x000000
0x000000
2
0x02
Channel 1, Biquad 1
C1H12(a1/2)
0x000000
3
0x03
C1H13(a2)
0x000000
4
0x04
C1H14(b0/2)
0x400000
5
0x05
Channel 1, Biquad 2
C1H20
0x000000
…
…
…
…
…
19
0x13
Channel 1, Biquad 4
C1H44
0x400000
20
0x14
C2H10
0x000000
Channel 2, Biquad 1
21
0x15
C2H11
0x000000
…
…
…
…
…
39
0x27
Channel 2, Biquad 4
C2H44
0x400000
40
0x28
C12H0(b1/2)
0x000000
41
0x29
Channel 1/2 - Biquad 5
C12H1(b2)
0x000000
for XO = 000
42
0x2A
Hi-pass 2nd Order filter
C12H2(a1/2)
0x000000
43
0x2B
for XO≠000
C12H3(a2)
0x000000
44
0x2C
C12H4(b0/2)
0x400000
45
0x2D
C3H0(b1/2)
0x000000
46
0x2E
Channel 3 - Biquad
C3H1(b2)
0x000000
for XO = 000
47
0x2F
Low-pass 2nd Order filter
C3H2(a1/2)
0x000000
48
0x30
for XO≠000
C3H3(a2)
0x000000
49
0x31
C3H4(b0/2)
0x400000
50
0x32
Channel 1, Pre-Scale
C1PreS
0x7FFFFF
51
0x33
Channel 2, Pre-Scale
C2PreS
0x7FFFFF
52
0x34
Channel 1, Post-Scale
C1PstS
0x7FFFFF
53
0x35
Channel 2, Post-Scale
C2PstS
0x7FFFFF
58/68
Share Link: 