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STA309A 数据表(PDF) 31 Page - STMicroelectronics

部件名 STA309A
功能描述  Multi-channel digital audio processor with DDX
PDF  67 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA309A 数据表(HTML) 31 Page - STMicroelectronics

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STA309A
Registers
31/67
7.2.7
Configuration register G (0x06)
The STA309A features a DDX processing mode that minimizes the amount of noise
generated in frequency range of AM radio. This mode is intended for use when DDX is
operating in a device with an AM tuner active. The SNR of the DDX processing is reduced to
~83 dB in this mode, which is still greater than the SNR of AM radio.
The STA309A features a 2 DDX processing modes that minimize the amount of noise
generated in frequency range of AM radio. This second mode is intended for use when DDX
is operating in a device with an AM tuner active. 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 and appropriate output device. This signal is a differential
3-wire drive called DDX Headphone.
D7
D6
D5
D4
D3
D2
D1
D0
MPCV
DCCV
HPE
AM2E
AME
COD
SID
PWMD
00
00
000
0
Table 34.
Register G bit definitions
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
3RW
0
AME
AM mode enable:
0: normal DDX operation.
1: AM reduction mode DDX operation.
Table 35.
AM2E bit
Bit
RW
RST
Name
Description
4RW
0
AM2E
AM2 mode enable:
0: normal DDX operation.
1: AM2 reduction mode DDX operation.
Table 36.
HPE bit
Bit
RW
RST
Name
Description
5RW
0
HPE
DDX headphone enable:
0: channels 7 and 8 normal DDX operation
1: channels 7 and 8 headphone operation



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