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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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CS4525 Datenblatt(PDF) 29 Page - Cirrus Logic |
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CS4525 Datenblatt(HTML) 29 Page - Cirrus Logic |
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29 / 98 page  DS726PP1 29 CS4525 6.1.3 Input Source Selection The CS4525 can accept analog or digital audio input signals. Digital audio input signals are supplied through the serial audio input port as outlined in “Serial Audio Interfaces” on page 62. Analog audio input signals are supplied through the internal ADC as outlined in “Analog Inputs” on page 61. The input source is selected by the ADC/SP bit in the Input Config register. In software mode, the serial audio input port supports I²S, Left-Justified and Right-Justified data formats. The serial audio input port digital interface format is configured by the DIF[2:0] bits in the Input Config reg- ister. The CS4525 internal ADC includes a dedicated high-pass filter to remove any DC content from the ADC output signal prior to the internal ADC/serial audio input port input multiplexor. This high-pass filter can be bypassed by clearing the EnAnHPF bit. 6.1.4 Digital Sound Processing The CS4525 implements flexible digital sound processing operations including bass management cross- over, 2-way speaker crossovers, high- and low-pass shelving filters, programmable parametric EQ filters, adaptive loudness compensation, channel mixers, and volume controls. The digital signal flow is shown in Figure 14 below. The signal processing blocks are described in detail in the following sections. Referenced Control Register Location ADC/SP............................... “Input Source Selection (ADC/SP)” on page 71 DIF[2:0] ............................... “Input Serial Port Digital Interface Format (DIF [2:0])” on page 71 EnAnHPF ............................ “ADC High-Pass Filter Enable (EnAnHPF)” on page 71 Amplifier Out 1 Amplifier Out 2 Amplifier Out 3 Amplifier Out 4 PWM Modulator Output 2 Audio Processing High-Pass Bass/Treble 2-Ch Mixer 2.1 Bass Mgr De-Emphasis Serial Audio Input Port Volume Auxiliary Serial Port Serial Audio Delay Interface PWM Output Config Gate Drive Power Stage Gate Drive Power Stage Gate Drive Power Stage Gate Drive Power Stage Stereo Analog In Serial Audio Clocks & Data Serial Audio Data I/O Serial Audio Clocks & Data PWM Modulator Output 1 Ch. A HPF Ch. A LPF Ch. B HPF Ch. B LPF Ch. A HPF Ch. A LPF Serial Audio Data In Left Right Ch. B HPF Ch. B LPF Ch. 1 Ch. 2 Aux Serial Data Select Data to Aux Port Sub Parametric EQ Linkwitz-Riley Crossover Adaptive Loudness Compensation High- Pass ADC Loudness Ch. A Ch. B Sub Temperature Sense Sample Rate Converter PWM Modulator Sub Sample Rate Converter PWM Modulator Ch. 2 Sample Rate Converter PWM Modulator Ch. 1 Temperature Sense Ch. B Ch. A Ch. A Ch. B Thermal Foldback Thermal Limiter Figure 14. Digital Signal Flow |
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