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STA381BWS 数据表(PDF) 98 Page - STMicroelectronics

部件名 STA381BWS
功能描述  Sound Terminal 2.1-channel high-efficiency digital audio system
PDF  174 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA381BWS 数据表(HTML) 98 Page - STMicroelectronics

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STA381BWS
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DocID018937 Rev 7
The thresholds and hysteresis table above can be overridden and the low-level threshold
and high-level threshold can be set by the MTH[21:0] bits.
To activate the manual thresholds the FINETH bit has to be set to ‘1’.
To configure the low threshold, the WTHL bit must be set to ‘1’ so that any write operation to
the MTH bits will set the low threshold.
To configure the low threshold, the WTHH bit must be set to ‘1’ so that any write operation to
the MTH bits will set the low threshold.
If the zero-mute block does not detect mute, it will mute the output when the current RMS
value falls below the low threshold.
If the zero-mute block does not detect mute, it will unmute the output when the current RMS
value rises above the high threshold.
Table 90. Manual threshold register 0x3F, 0x40 and 0x6F
Table 89. Zero-detect hysteresis
HSEL[1:0]
Equivalent input level hysteresis(dB)
00
3
01
4
10
5
11
6
D7
D6
D5
D4
D3
D2
D1
D0
ReservedT
Reserved
MTH[21:16]
00000000
D7
D6
D5
D4
D3
D2
D1
D0
MTH[15:8]
00000000
D7
D6
D5
D4
D3
D2
D1
D0
MTH[7:0]
00000000
Obsolete
Product(s)
- Obsolete
Product(s)



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