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STV8216 数据表(PDF) 69 Page - STMicroelectronics |
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STV8216 数据表(HTML) 69 Page - STMicroelectronics |
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69 / 97 page  69/97 STV82x6 Register List Note: 1 When the SVC is in Automatic mode (SVC_ON = 1), internal clipping may occur with a high reference level (REF_LEVEL = -2.5 or -6 dB). The maximum recommended value is -8.5 dB. 2 A mute of the corresponding audio output is recommended before switching ON/OFF. A gain discontinuity may create annoying audible plops. SVC_TIME[1:0] 10 Defines the constant time of the gain loop. Time Constant for 6 dB Amplification 00: 16 s (Default) 01: 8 s 10: 4 s 11: 2 s SVC_REF[4:0] 00000 Smart Volume Control Reference Level Select If SVC_ON = 0, this value defines the prescaling gain ranging from -30 dB to +15.5 dB. If SVC_ON = 1, this value defines the output reference level of the regulation ranging from -2.5 dB down to -30 dB. The SVC output level must be adjusted to avoid internal clipping due to post- processing with amplification, i.e. ST/SRS™ Surround Sound (+9 dB max), Equalizer or Bass/ Treble (+12 dB max) and Loudness (+6 dB max). Programmable values are listed in Table 23. Table 23: SVC Bit Values SVC_ON = 0 SVC_ON = 1 SVC_REF[4:0] REF_LEVEL (dB) SVC_REF[4:0] REF_LEVEL (dB) > 00101 Reserved > 00101 Reserved 00101 +15.5 00101 -12 00100 +12 00100 -12 00011 +9.5 00011 -12 00010 6 00010 -12 00001 3.5 00001 -12 00000 (Default) 0 00000 -12 11111 -2.5 111111 -2.5 11110 -6 111101 -6 11101 -8.5 11101 -8.5 11100 -12 11100 -12 11011 -14.5 11011 -14.5 11010 -18 11010 -18 11001 -20.5 11001 -20.5 11000 -24 11000 -24 10111 -26.5 10111 -26.5 10110 -30 10110 -30 <10110 Reserved < 10110 Reserved Bit Name Reset Function |
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