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CS47048 Datasheet(PDF) 9 Page - Cirrus Logic |
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CS47048 Datasheet(HTML) 9 Page - Cirrus Logic |
9 / 34 page CS47048 Data Sheet Audio SOC Processor Family DS787A7 Copyright 2008 Cirrus Logic 9 CS47048 functionality is controlled by application codes that are stored in on-chip ROM or downloaded to the CS47048 from a host controller or external serial FLASH/EEPROM. Users can develop their applications using DSP ComposerTM to create the processing chain and then compile the image into a series of commands that are sent to the CS47048 through the SCP. The processing application can either load modules (post-processors) from the DSP’s on-chip ROM, or custom firmware can be downloaded through the SCP. The CS47048 is suitable for a variety of audio post-processing applications where sound quality via sound enhancement and speaker/cabinet tuning is required to achieve the sound quality consumers expect. Examples of such applications include automotive head-ends, automotive amplifiers, docking stations, sound bars, subwoofers, and boom boxes. 4.2 DSP Memory The DSP core has its own on-chip data and program RAM and ROM and does not require external memory for post-processing applications. The Y-RAM and P-RAM share a single block of memory that includes three 2K word blocks (32 bits/word) that are assignable to either Y-RAM or P-RAM as shown in Table 3. 4.2.1 DMA Controller The powerful 8-channel DMA controller can move data between 8 on-chip resources. Each resource has its own arbiter: X, Y, and P RAMs/ROMs and the peripheral bus. Modulo and linear addressing modes are supported, with flexible start address and increment controls. The service intervals for each DMA channel, as well as up to 6 interrupt events, are programmable. 4.3 On-chip DSP Peripherals 4.3.1 Analog to Digital Converter Port (ADC) The CS47048 features ADCs with dynamic range performance in excess of 100 dB, and they can support up to 4 simultaneous channels of analog-to-digital conversion. Analog inputs AIN_1A and AIN_1B are connected directly to one stereo ADC (ADC0-1). The analog input capability of the second stereo ADC (ADC2-3) is expanded through a 5:1 analog stereo mux (analog inputs AIN_2A/B through AIN_6A/B). This gives the CS47048 the ability to select from six stereo pairs of analog input. A single programmable bit selects single-ended or differential mode signals for all inputs. The conversions are performed with either Fs=96 kHz or Fs=192 kHz. 4.3.2 Digital to Analog Converter Port (DAC) The CS47048 can support up to 8 simultaneous channels of digital-to-analog conversion and features DACs with dynamic range performance in excess of 100 dB. The DACs have voltage mode outputs that can be connected either as single-ended or differential signals. The conversions are performed with Fs=96 kHz. Table 3. Memory Configurations for CS47048 P-RAM X-RAM Y-RAM 14K words 10K words 8K words 12K words 10K words 10K words 10K words 10K words 12K words 8K words 10K words 14K words |
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