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STA323W 数据表(PDF) 43 Page - STMicroelectronics

部件名 STA323W
功能描述  2.1 high efficiency digital audio system
PDF  71 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA323W 数据表(HTML) 43 Page - STMicroelectronics

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STA323W
Register descriptions
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7.6
Configuration register E (address 0x04)
7.6.1
Max power correction variable
By enabling MPC and setting MPCV = 1, the max power correction becomes variable. By
adjusting the MPCC registers (address 0x27-0x28) it is possible to adjust the THD at
maximum unclipped power to a lower value for a particular application.
7.6.2
Max power correction
Setting the MPC bit corrects the power device at high power. This mode lowers the THD+N
of the full DDX® system at, and slightly below, maximum power output.
7.6.3
AM mode enable
The STA323W features a DDX® processing mode that minimizes the amount of noise
generated in the frequency range of AM radio. This mode is intended for use when DDX® is
operating in a device with an active AM tuner. The SNR of the DDX® processing is reduced
to ~83 dB in this mode, which is still greater than the SNR of AM radio.
D7
D6
D5
D4
D3
D2
D1
D0
SVE
ZCE
RES
PWMS
AME
RES
MPC
MPCV
000
0
0
0
0
0
Table 36.
Max power correction variable
Bit
R/W
RST
Name
Description
0R/W
0
MPCV
0: use standard MPC coefficient
1: use MPCC bits for MPC coefficient
Table 37.
Max power correction
Bit
R/W
RST
Name
Description
7R/W
1
MPC
0: MPC disabled
1: MPC enabled
Table 38.
AM mode enable
Bit
R/W
RST
Name
Description
3R/W
0
AME
0: normal DDX® operation
1: AM reduction mode DDX® operation



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