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CS47L35 Datasheet(PDF) 26 Page - Cirrus Logic |
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CS47L35 Datasheet(HTML) 26 Page - Cirrus Logic |
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26 / 300 page  26 DS1085F3 CS47L35 4 Functional Description 4 Functional Description The CS47L35 is a highly integrated, low-power audio hub codec for mobile telephony and portable devices. It provides flexible, high-performance audio interfacing for handheld devices in a small and cost-effective package. It also provides exceptional levels of performance and signal-processing capability, suitable for a wide variety of mobile and handheld devices. 4.1 Overview The CS47L35 block diagram is shown in Fig. 4-1. Figure 4-1. CS47L35 Block Diagram The CS47L35 digital core provides an extensive capability for signal-processing algorithms, including transmit (TX) path noise reduction, acoustic-echo cancelation (AEC), and other programmable filters. The DSPs are ideally suited to the Cirrus Logic® SoundClear® suite of audio processing algorithms, such as the SoundClear Control always-on voice control software. The digital core provides signal-processing capability for sensor-hub functions. The integration of external sensors with the programmable DSP enables increased contextual awareness in a variety of advanced user applications. The CS47L35 digital core supports audio enhancements, such as dynamic range control (DRC) and multiband compression (MBC). Highly flexible digital mixing, including stereo full-duplex isochronous sample-rate conversion, provides use-case flexibility across a broad range of system architectures. A signal generator for controlling haptics vibe actuators is included. The CS47L35 provides multiple digital audio interfaces, including SLIMbus, to provide independent isochronous connections to different processors (e.g., application processor, baseband processor, and wireless transceiver). Digital Core Programmable multicore DSP Advanced multimic Tx noise reduction Advanced multimic acoustic echo cancelation Advanced always-on buffering Trigger word detection and ASR assist Speaker protection Five-band equal izer (EQ) Dynamic range control (DRC) Low-pass/high-pass filter (LHPF) Automatic sample-rate detection Tone generator Noise generator PWM signal generator Haptic control signal generator Digital Audio Interface AIF1 Digital Audio Interface AIF2 Digital Audio Interface AIF3 SPKOUTP SPKOUTN DAC HPOUTL HPOUTR DAC DAC HPOUTFB1 LDO and MICBIAS Generators Charge Pumps MICBIAS1A MICBIAS1B Reference Generator AVDD AGND VREFC GPSWN General Purpose Switch GPSWP AEC (Echo Cancelation) Loop-Back RESET IRQ AIFnBCLK AIFnLRCLK MCLK2 MCLK1 SYSCLK Clocking Control 1 x FLL SLIMCLK SLIMbus Interface Control Interfaces (SPI, I2C) Master Interface (I2C) MICBIAS2A MICBIAS2B EPOUTP EPOUTN SPKCLK SPKDAT PDM Driver External Accessory Detect IN1BLN IN1BLP IN1ALN/DMICCLK1 IN1ALP IN1BRN IN1BRP IN1ARN/DMICDAT1 IN1ARP IN2LN/DMICCLK2 IN2LP IN2RN/DMICDAT2 IN2RP Input Select Input Select ADC ADC ADC ADC Digital Mic Interface Digital Mic Interface CS47L35 |
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