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STA321MPL1 数据表(PDF) 56 Page - STMicroelectronics

部件名 STA321MPL1
功能描述  Scalable digital microphone processor
PDF  80 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA321MPL1 数据表(HTML) 56 Page - STMicroelectronics

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Configuration registers (0x77; 0x78; 0x79)
STA321MPL1
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DocID029389 Rev 1
6.1
Post-scale
The STA321MPL1 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 multiplication is loaded into the 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 microcontroller to
perform power-supply error corrections. All channels can use channel 1 by setting the post-
scale link bit.
Table 11. RAM block for biquads, mixing, and bass management
Index
(decimal)
Index
(hex)
Parameter
Coefficient
Default
0
0x00
Channel 1 - Biquad 1
C1H10 (b1/2)
0x000000
1
0x01
C1H11 (b2)
0x000000
2
0x02
C1H12 (a1/2)
0x000000
3
0x03
C1H13 (a2)
0x000000
4
0x04
C1H14 (b0/2)
0x400000
5
0x05
Channel 1 - Biquad 2
C1H20
0x000000
……
…
…
…
49
0x31
Channel 1 - Biquad 10
C1HA4
0x400000
50
0x32
Channel 2 - Biquad 1
C2H10
0x000000
51
0x33
C2H11
0x000000
……
…
…
…
99
0x63
Channel 2 - Biquad 10
C2HA4
0x4000000
100
0x64
Channel 3 - Biquad 1
C3H10
0x000000
……
…
…
…
399
0x18F
Channel 8 - Biquad 10
C8HA4
0x400000
400
0x190
Channel 1 - Pre-scale
C1PreS
0x7FFFFF
401
0x191
Channel 2 - Pre-scale
C2PreS
0x7FFFFF
402
0x192
Channel 3 - Pre-scale
C3PreS
0x7FFFFF
……
…
…
…
407
0x197
Channel 8 - Pre-scale
C8PreS
0x7FFFFF
408
0x198
Channel 1 - Post-scale
C1PstS
0x7FFFFF
409
0x199
Channel 2 - Post-scale
C2PstS
0x7FFFFF
……
…
…
…
415
0x19F
Channel 8 - Post-scale
C8PstS
0x7FFFFF
416
0x1A0
Channel 1 - Mix# 1 1
C1MX11
0x7FFFFF
417
0x1A1
Channel 1 - Mix#1 2
C1MX12
0x000000



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