sta381bws STMicroelectronics, sta381bws Datasheet - Page 63
sta381bws
Manufacturer Part Number
sta381bws
Description
Sound Terminal 2.1-channel High-efficiency Digital Audio System Sound Terminal 2.1-channel High-efficiency Digital Audio System
Manufacturer
STMicroelectronics
Datasheet
1.STA381BWS.pdf
(168 pages)
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STA381BWS
6.16
6.16.1
6.16.2
6.16.3
Table 38.
Configuration register D (addr 0x14)
DSP bypass
Table 39.
Setting the DSPB bit bypasses the EQ function of the STA381BWS.
Post-scale link
Table 40.
Post-scale functionality can be used for power-supply error correction. For multi-channel
applications running off the same power supply, the post-scale values can be linked to the
value of channel 1 for ease of use and in order to update the values faster.
Biquad coefficient link
Table 41.
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. Therefore, any EQ updates only have to
be performed once.
Table 6:
Bit
Bit
Bit
2
3
4
SME
D7
0
CSZ[3:0]
0000
0001
1111
…
R/W
R/W
R/W
R/W
R/W
R/W
Compensating pulse size
DSP bypass
Post-scale link
Biquad coefficient link
ZDE
D6
0
RST
RST
RST
0
1
1
0 ns (0 tick) compensating pulse size
20 ns (1 tick) clock period compensating pulse size
…
300 ns (15 tick) clock period compensating pulse size
Reserved
D5
0
Doc ID 018937 Rev 2
DSPB
Name
Name
Name
BQL
PSL
BQL
D4
1
Compensating pulse size
0: Normal operation
1: Bypass of biquad and bass/treble functions
0: Each channel uses individual post-scale value
1: Each channel uses channel 1 post-scale value
0: Each channel uses coefficient values
1: Each channel uses channel 1 coefficient values
PSL
D3
1
Register description: New Map
DSPB
Description
Description
Description
D2
0
Reserved
D1
0
Reserved
D0
0
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