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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8978GEFL/V датащи(PDF) 37 Page - Wolfson Microelectronics plc |
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WM8978GEFL/V датащи(HTML) 37 Page - Wolfson Microelectronics plc |
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37 / 78 page  Product Preview WM8978 w PP Rev 1.7 January 2005 37 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 4:0 EQ4G 01100 (0dB) Band 4 Gain Control. See Table 28 for details 6:5 EQ4C 01 Band 4 Centre Frequency: 00=1.8kHz 01=2.4kHz 10=3.2kHz 11=4.1kHz R21 EQ Band 4 Control 8 EQ4BW 0 Band 4 Bandwidth Control 0=narrow bandwidth 1=wide bandwidth Table 26 EQ Band 4 Control REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 4:0 EQ5G 01100 (0dB) Band 5 Gain Control. See Table 28 for details. R22 EQ Band 5 Gain Control 6:5 EQ5C 01 Band 5 Cut-off Frequency: 00=5.3kHz 01=6.9kHz 10=9kHz 11=11.7kHz Table 27 EQ Band 5 Control GAIN REGISTER GAIN 00000 +12dB 00001 +11dB 00010 +10dB …. (1dB steps) 01100 0dB 01101 -1dB 11000 to 11111 -12dB Table 28 Gain Register Table 3D STEREO ENHANCEMENT The WM8978 has a digital 3D enhancement option to artificially increase the separation between the left and right channels. Selection of 3D for record or playback is controlled by register bit EQ3DMODE. Switching this bit from record to playback or from playback to record may only be done when ADC and DAC are disabled. The WM8978 control interface will only allow EQ3DMODE to be changed when ADC and DAC are disabled (ie ADCENL = 0, ADCENR = 0, DACENL = 0 and DACENR = 0). The DEPTH3D setting controls the degree of stereo expansion. When 3D enhancement is used, it may be necessary to attenuate the signal by 6dB to avoid limiting. |
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