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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8595 датащи(PDF) 29 Page - Wolfson Microelectronics plc |
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WM8595 датащи(HTML) 29 Page - Wolfson Microelectronics plc |
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29 / 82 page  Production Data WM8595 w PD, Rev 4.2, January 2011 29 DAC FEATURES The WM8595 includes two 24-bit DACs with independent clocks and independent data inputs. The DACs include digital volume control with zero cross and soft mute, de-emphasis support, and the capability to select the output channels to be stereo or a range of mono options. The DACs are enabled by writing to DAC1_EN and DAC2_EN. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R2 DAC1_CTRL1 02h 8 DAC1_EN 0 DAC1 Enable 0 = DAC disabled 1 = DAC enabled R7 DAC2_CTRL1 07h 8 DAC2_EN 0 DAC2 Enable 0 = DAC2 disabled 1 = DAC2 enabled Table 16 DAC Enable Control DIGITAL VOLUME CONTROL The WM8595 DACs include independent digital volume control, allowing the digital gain to be adjusted between -100dB and +12dB in 0.5dB steps. All four DAC channels can be controlled independently. Alternatively, global update bits allow the user to write all volume changes before the volume is updated. Volume control includes optional zero cross functionality. When zero cross is enabled, volume changes are not applied until the output level crosses VMID. Zero cross helps to prevent pop and click noise when changing volume settings. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R5 DAC1L_VOL 05h 7:0 DAC1L _VOL[7:0] 11001000 DAC Digital Volume 0000 0000 = -100dB 0000 0001 = -99.5dB 0000 0010 = -99dB …0.5dB steps 1100 1000 = 0dB …0.5dB steps 1101 1111 = +11.5dB 111X XXXX = +12dB R6 DAC1R_VOL 06h 7:0 DAC1R _VOL[7:0] R10 DAC2L_VOL 0Ah 7:0 DAC2L _VOL[7:0] R11 DAC2R_VOL 0Bh 7:0 DAC2R _VOL[7:0] R5 DAC1L_VOL 05h 8 DAC1L_VU 0 DAC Digital Volume Update 0 = Latch DAC volume setting into Register Map but do not update volume 1 = Latch DAC volume setting into Register Map and update left and right channels simultaneously R6 DAC1R_VOL 06h 8 DAC1R_VU R10 DAC2L_VOL 0Ah 8 DAC2L_VU R11 DAC2R_VOL 0Bh 8 DAC2R_VU |
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