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STA321MPL 数据表(PDF) 26 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) 26 Page - STMicroelectronics

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Registers
STA321MP
26/50
Doc ID 022647 Rev 1
7.2.5
Configuration register G (0x06)
The STA321MP features an FFX processing mode that minimizes the amount of noise
generated in the frequency range of AM radio. This mode is intended for use when FFX is
operating in a device with an active AM tuner. The SNR of the FFX processing is reduced to
~83 dB in this mode, which is still greater than the SNR of AM radio.
The STA321MP features two FFX processing modes that minimize the amount of noise
generated in the frequency range of AM radio. This second mode is intended for use when
FFX is operating in a device with an active AM tuner. This mode eliminates the noise-
shaper.
Channels 7 and 8 can be configured to be processed and output in such a manner that
headphones can be driven using an appropriate output device. This signal is a differential
3-wire drive called FFX headphone.
D7
D6
D5
D4
D3
D2
D1
D0
MPCV
DCCV
HPE
AM2E
AME
COD
SID
PWMD
00
00
00
0
0
Bit
RW
RST
Name
Description
0RW
0
PWMD
PWM output disable:
0: PWM output normal
1: no PWM output
1RW
0
SID
Serial interface (I2S out) disable:
0: I2S output normal
1: no I2S output
2RW
0
COD
Clock output disable:
0: clock output normal
1: no clock output
Bit
RW
RST
Name
Description
3RW
0
AME
AM mode enable:
0: normal FFX operation
1: AM reduction mode FFX operation
Bit
RW
RST
Name
Description
4RW
0
AM2E
AM2 mode enable:
0: normal FFX operation
1: AM2 reduction mode FFX operation
Bit
RW
RST
Name
Description
5RW
0
HPE
FFX headphone enable:
0: channels 7 and 8 normal FFX operation
1: channels 7 and 8 headphone operation



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