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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8976CGEFL/V датащи(PDF) 60 Page - Wolfson Microelectronics plc |
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WM8976CGEFL/V датащи(HTML) 60 Page - Wolfson Microelectronics plc |
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60 / 114 page  WM8976 Production Data w PD, Rev 4.5, November 2011 60 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R56 OUT3 mixer control 6 OUT3MUTE 0 0 = Output stage outputs OUT3 mixer 1 = Output stage muted – drives out VMID. Can be used as VMID buffer in this mode. 3 OUT4_2OUT3 0 OUT4 mixer output to OUT3 0 = disabled 1= enabled 2 BYPL2OUT3 0 ADC input to OUT3 0 = disabled 1= enabled 1 LMIX2OUT3 0 Left DAC mixer to OUT3 0 = disabled 1= enabled 0 LDAC2OUT3 1 Left DAC output to OUT3 0 = disabled 1= enabled R57 OUT4 mixer control 6 OUT4MUTE 0 0 = Output stage outputs OUT4 mixer 1 = Output stage muted – drives out VMID. Can be used as VMID buffer in this mode. 5 HALFSIG 0 0=OUT4 normal output 1=OUT4 attenuated by 6dB 4 LMIX2OUT4 0 Left DAC mixer to OUT4 0 = disabled 1= enabled 3 LDAC2OUT4 0 Left DAC to OUT4 0 = disabled 1= enabled 1 RMIX2OUT4 0 Right DAC mixer to OUT4 0 = disabled 1= enabled 0 RDAC2OUT4 1 Right DAC output to OUT4 0 = disabled 1= enabled Table 46 OUT3/OUT4 Mixer Registers The OUT3 and OUT4 output stages each have a selectable gain boost of 1.5x (3.52dB). When this boost is enabled the output DC level is also level shifted (from AVDD/2 to 1.5xAVDD/2) to prevent the signal from clipping. A dedicated amplifier BUFDCOP, as shown in Figure 32, is used to perform the DC level shift operation. This buffer must be enabled using the BUFDCOPEN register bit for this operating mode. It should also be noted that if SPKVDD is not equal to or greater than 1.5xAVDD this boost mode may result in signals clipping. Table 43 summarises the effect of the OUT3BOOST and OUT4BOOST control bits. |
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