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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8955LEFL датащи(PDF) 25 Page - Wolfson Microelectronics plc |
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WM8955LEFL датащи(HTML) 25 Page - Wolfson Microelectronics plc |
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25 / 43 page  Product Preview WM8955L w Product Preview Rev 0.4 May2003 25 LOUT2/ROUT2 OUTPUTS The LOUT2 and ROUT2 output pins are essentiallysimilar to LOUT1 and ROUT1, but theyare independentlycontrolled and can also drive an 8 Ω mono speaker. For speaker drive, the ROUT2 signal must be inverted (ROUT2INV = 1), so that the left and right channel are mixed to mono in the speaker [L–(-R) = L+R]. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 6:0 LOUT2VOL 1111001 (0dB) similar to LOUT1VOL 7 LO2ZC 0 Left zero cross enable 1 = Change gain on zero cross only 0 = Change gain immediately R40 (28h) LOUT2 Volume 8 LO2VU 0 similar to LO1VU 6:0 ROUT2VOL 1111001 (0dB) similar to ROUT1VOL 7 RO2ZC 0 Left zero cross enable 1 = Change gain on zero cross only 0 = Change gain immediately R41 (29h) ROUT2 Volume 8 RO2VU 0 similar to RO1VU R23 (17h) 0 TOEN 1 as for LOUT1 / ROUT1 R24 (18h) Additional (2) 3 ROUT2INV 0 ROUT2 Invert 0= No Inversion(0 ° phase shift) 1 = Signal inverted (180 ° phase shift) Table 15 LOUT2/ROUT2 Control MONO OUTPUT The MONOOUT pin can drive a mono line output. The signal volume on MONOOUT can be adjusted under software control bywriting to MONOOUTVOL. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 6:0 MONOOUT VOL 1111001 (0dB) MONOOUT Volume 1111111 = +6dB … (80 steps) 0110000 = -67dB 0101111 to 0000000 = Analogue MUTE R42 (2Ah) MONOOUT Volume 7 MOZC 0 MONOOUT zero cross enable 1 = Change gain on zero cross only 0 = Change gain immediately R23 (17h) 0 TOEN 1 as for LOUT1 / ROUT1 Table 16 MONOOUT Volume Control OUT3 OUTPUT TheOUT3 pin candrive a 16 Ω or 32Ω headphone or a line output or be used as a DC reference for a headphone output. It can be selected to either drive out an inverted ROUT1 or inverted MONOOUT for e.g. an earpiece drive between OUT3 and LOUT1 or differential output between OUT3 and MONOOUT. OUT3SW selects the mode of operation required. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R24 (18h) Additional (2) 8:7 OUT3SW 00 OUT3 select 00 : VREF 01 : ROUT1 10 : MONOOUT 11 : right mixer output Table 17 OUT3 select |
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