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STA381BW Datasheet(PDF) 95 Page - STMicroelectronics |
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STA381BW Datasheet(HTML) 95 Page - STMicroelectronics |
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95 / 171 page  STA381BW Register description: New Map Doc ID 018835 Rev 7 95/171 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] 00 00 00 0 0 D7 D6 D5 D4 D3 D2 D1 D0 MTH[15:8] 00 00 00 0 0 D7 D6 D5 D4 D3 D2 D1 D0 MTH[7:0] 00 00 00 0 0 |
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