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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8985GEFL/R датащи(PDF) 103 Page - Wolfson Microelectronics plc |
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WM8985GEFL/R датащи(HTML) 103 Page - Wolfson Microelectronics plc |
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103 / 121 page  Production Data WM8985 w PD, Rev 4.6, July 2009 103 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION REFER TO 29 (1Dh) 8 NFU 0 Notch filter update. The notch filter values used internally only update when one of the NFU bits is set high. Analogue to Digital Converter (ADC) 7 0 Reserved. Initialise to 0 6:0 NFA1[13:7] 0000000 Notch Filter a1 coefficient, bits [13:7] Analogue to Digital Converter (ADC) 30 (1Eh) 8 NFU 0 Notch filter update. The notch filter values used internally only update when one of the NFU bits is set high. Analogue to Digital Converter (ADC) 7 0 Reserved. Initialise to 0 6:0 NFA1[6:0] 0000000 Notch Filter a1 coefficient, bits [6:0] Analogue to Digital Converter (ADC) 32 (20h) 8:7 ALCSEL 00 ALC function select: 00=ALC off 01=ALC right only 10=ALC left only 11=ALC both on Input Limiter/ Automatic Level Control (ALC) 6 0 Reserved. Initialise to 0 5:3 ALCMAXGAIN 111 Set Maximum Gain of PGA 111=+35.25dB 110=+29.25dB 101=+23.25dB 100=+17.25dB 011=+11.25dB 010=+5.25dB 001=-0.75dB 000=-6.75dB Input Limiter/ Automatic Level Control (ALC) 2:0 ALCMINGAIN 000 Set minimum gain of PGA 000=-12dB 001=-6dB 010=0dB 011=+6dB 100=+12dB 101=+18dB 110=+24dB 111=+30dB Input Limiter/ Automatic Level Control (ALC) 33 (21h) 7:4 ALCHLD 0000 ALC hold time before gain is increased. 0000 = 0ms 0001 = 2.67ms 0010 = 5.33ms … (time doubles with every step) 1111 = 43.691s Input Limiter/ Automatic Level Control (ALC) 3:0 ALCLVL 1011 ALC target – sets signal level at ADC input 1111 : -1.5dBFS 1110 : -1.5dBFS 1101 : -3dBFS 1100 : -4.5I...... (-1.5dB steps) 0001 : -21dBFS 0000 : -22.5dBFS Input Limiter/ Automatic Level Control (ALC) |
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