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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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CS4392 Arkusz danych(PDF) 20 Page - Cirrus Logic |
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CS4392 Arkusz danych(HTML) 20 Page - Cirrus Logic |
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20 / 42 page  CS4392 20 DS459PP2 6.2 Volume and Mixing Control (Address 02h) 6.2.1 Channel A Volume = Channel B Volume (Bit 7) Function: The AOUTA and AOUTB volume levels are independently controlled by the A and the B Channel Vol- ume Control Bytes when this function is disabled. The volume on both AOUTA and AOUTB are de- termined by the A Channel Volume Control Byte and the B Channel Byte is ignored when this function is enabled. 6.2.2 Soft Ramp or Zero Cross Enable (Bits 6:5) Function: Soft Ramp Enable Soft Ramp allows level changes, both muting and attenuation, to be implemented by incrementally ramping, in 1/8 dB steps, from the current level to the new level at a rate of 1dB per 8 left/right clock periods. Zero Cross Enable Zero Cross Enable dictates that signal level changes, either by attenuation changes or muting, will occur on a signal zero crossing to minimize audible artifacts. The requested level change will occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is independently mon- itored and implemented for each channel. Soft Ramp and Zero Cross Enable Soft Ramp and Zero Cross Enable dictates that signal level changes, either by attenuation changes or muting, will occur in 1/8 dB steps and be implemented on a signal zero crossing. The 1/8 dB level change will occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is independently monitored and implemented for each channel. See Table 12 6.2.3 ATAPI Channel Mixing and Muting (Bits 4:0) Function: The CS4392 implements the channel mixing functions of the ATAPI CD-ROM specification. See Table 13 on page 21 76543 210 A = B Soft Zero Cross ATAPI4 ATAPI3 ATAPI2 ATAPI1 ATAPI0 SOFT ZERO Mode 0 0 Changes to affect immediately 0 1 Zero Cross enabled 1 0 Soft Ramp enabled (default) 1 1 Soft Ramp and Zero Cross enabled Table 12. Soft Cross or Zero Cross Mode Selection |
Podobny numer części - CS4392 |
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Podobny opis - CS4392 |
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