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STA321MPL 数据表(PDF) 24 Page - STMicroelectronics

部件名 STA321MPL
功能描述  Scalable digital microphone processor
PDF  50 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA321MPL 数据表(HTML) 24 Page - STMicroelectronics

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Registers
STA321MP
24/50
Doc ID 022647 Rev 1
7.2.3
Configuration register E (0x04)
Each individual channel output can be set to output a binary PWM stream. In this mode
output A of a channel will be considered the positive output and output B is the negative
inverse.
7.2.4
Configuration register F (0x05)
The STA321MP features an internal digital high-pass filter for the purpose of AC coupling.
The purpose of this filter is to prevent DC signals from passing through an FFX amplifier. DC
signals can cause speaker damage.
If HPB = 1, then the filter that the high-pass filter utilizes is made available as user-
programmable biquad#1.
Both limiters can be used in one of two ways, anti-clipping or dynamic range compression.
When used in anti-clipping mode, the limiter threshold values are constant and dependent
on the limiter settings.
D7
D6
D5
D4
D3
D2
D1
D0
C8BO
C7BO
C6BO
C5BO
C4BO
C3BO
C2BO
C1BO
00
00
00
0
0
Bit
RW
RST
Name
Description
0RW
0
C1BO
Channels 1, 2, 3, 4, 5, 6, 7, and 8 binary output
mode enable bits. A setting of 0 indicates ordinary
FFX tristate output. A setting of 1 indicates binary
output mode.
1RW
0
C2BO
2RW
0
C3BO
3RW
0
C4BO
4RW
0
C5BO
5RW
0
C6BO
6RW
0
C7BO
7RW
0
C8BO
D7
D6
D5
D4
D3
D2
D1
D0
PWMS2
PWMS1
PWMS0
BQL
PSL
DEMP
DRC
HPB
00
00
00
0
0
Bit
RW
RST
Name
Description
0RW
0
HPB
High-pass filter bypass bit: a setting of 1 bypasses
the internal AC coupling digital high-pass filter
Bit
RW
RST
Name
Description
1
RW
0
DRC
Dynamic range compression/anti-clipping
0: limiters act in anti-clipping mode
1: limiters act in dynamic range compression mode



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