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CS4299-KQZ Datasheet(PDF) 11 Page - Cirrus Logic |
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CS4299-KQZ Datasheet(HTML) 11 Page - Cirrus Logic |
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11 / 52 page  CS4299 11 Slot 2. Write operations are similar, with the regis- ter index in Slot 1 and the write data in Slot 2 of a SDATA_OUT frame. The function of each input and output frame is detailed in Section 3, AC Link Frame Definition. Individual register descriptions are found in Section 4, Register Interface. 2.3 Sample Rate Converters The Sample Rate Converters (SRCs) provide high accuracy digital filters supporting sample frequen- cies other than 48 kHz to be captured from the CS4299 or played from the controller. AC ’97 re- quires support for two audio rates (44.1 and 48kHz). In addition, the Intel® I/O Controller Hub (ICHx) specification requires support for five more audio rates (8, 11.025, 16, 22.05, and 32). The CS4299 supports all these rate, as shown in Table 7 on page 29. 2.4 Output Mixer The CS4299 has two output mixers, illustrated in Figure 8. The stereo output mixer sums together the analog inputs to the CS4299, including the PC_BEEP and PHONE signals, according to the settings in the volume control registers. The stereo output mix is sent to the LINE_OUT and ALT_LINE_OUT pins on the CS4299. The mono output mixer generates a monophonic sum of the left and right channels from the stereo input mixer. The mono output mix is sent to the MONO_OUT output pin on the CS4299. 2.5 Input Mux The input multiplexer controls which analog input is sent to the ADCs. The output of the input mux is converted to stereo 18-bit digital PCM data and sent to the controller by means of the AC-link SDATA_IN signal. 2.6 Volume Control The CS4299 volume registers control analog input levels to the input mixer and analog output levels, including the master volume level, and the alternate volume level. The PC_BEEP volume control uses 3 dB steps with a range of 0 dB to -45 dB attenua- tion. All other analog volume controls use 1.5 dB steps. The analog inputs have a mixing range of +12 dB signal gain to -34.5 dB signal attenuation. The analog output volume controls have from 0 dB to -94.5 dB attenuation for LINE_OUT and from 0 dB to -46.5 dB attenuation for ALT_LINE_OUT and MONO_OUT. DS319PP6 11 CS4299 |
Número de pieza similar - CS4299-KQZ |
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Descripción similar - CS4299-KQZ |
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