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STA328 数据表(PDF) 29 Page - STMicroelectronics

部件名 STA328
功能描述  2.1-channel high-efficiency digital audio system
PDF  57 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA328 数据表(HTML) 29 Page - STMicroelectronics

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STA328
Register description
29/57
6.5
Configuration register E (addr 0x04)
By enabling MPC and setting MPCV = 1, the max power correction becomes variable. By
adjusting the MPCC registers (address 0x27, 0x28) it becomes possible to adjust the THD
at maximum unclipped power to a lower value for a particular application.
Setting the MPC bit corrects the DDX® power device at high power. This mode lowers the
THD+N of a full DDX® system at maximum power output and slightly below.
The STA328 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 approximately 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
Reserved
PWMS
AME
Reserved
MPC
MPCV
1
1
0
0
001
0
Table 33.
Max power correction variable
Bit
R/W
RST
Name
Description
0RW
0
MPCV
Max power correction variable:
0: use standard MPC coefficient
1: use MPCC bits for MPC coefficient
Table 34.
Max power correction
Bit
R/W
RST
Name
Description
1RW
1
MPC
Max power correction:
0: MPC disabled
1: MPC enabled
Table 35.
AM mode enable
Bit
R/W
RST
Name
Description
3RW
0
AME
AM mode enable:
0: normal DDX® operation.
1: AM reduction mode DDX® operation.
Table 36.
PWM speed mode
Bit
R/W
RST
Name
Description
4
RW
0
PWMS
PWM speed selection: normal or odd
Table 37.
PWM output speed selections
PWMS[1:0]
PWM output speed
0
Normal speed (384 kHz) all channels
1
Odd speed (341.3 kHz) all channels



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