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STA323W 数据表(PDF) 46 Page - STMicroelectronics

部件名 STA323W
功能描述  2.1-channel high-efficiency digital audio system
PDF  77 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) 46 Page - STMicroelectronics

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Register descriptions
STA323W
46/77
7.5
Configuration register E (address 0x04)
7.5.1
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.
7.5.2
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.
7.5.3
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.
7.5.4
PWM speed mode
D7
D6
D5
D4
D3
D2
D1
D0
SVE
ZCE
Reserved
PWMS
AME
Reserved
MPC
MPCV
110
00010
Table 36.
Max power correction variable
Bit
R/W
RST
Name
Description
0RW
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
1RW
1
MPC
0: MPC disabled
1: MPC enabled
Table 38.
AM mode enable
Bit
R/W
RST
Name
Description
3RW
0
AME
0: normal DDX® operation
1: AM reduction mode DDX® operation
Table 39.
PWM speed mode
Bit
R/W
RST
Name
Description
4
RW
0
PWMS
Normal or odd



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