Cirrus-logic CS470xx Manuale Utente

Copyright  Cirrus Logic, Inc. 2012(All Rights Reserved)http://www.cirrus.comDS787PP9JUL '12CS470xx Data SheetFeatures Cost-effective, High-perf

DS787PP9 10 4.3 On-chip DSP Peripherals4.3.2 Digital to Analog Converter Port (DAC)The DACs in the CS470xx devices feature dynamic range performance i

11 DS787PP94.4 DSP I/O Description 4.3.8 Serial Control Port (I2C or SPI)The on-chip serial control port is capable of operating as master or slave in

DS787PP9 12 5 Characteristics and Specifications5 Characteristics and SpecificationsNote: All data sheet minimum and maximum timing parameters are gua

13 DS787PP95.4 Power Supply Characteristics 5.4 Power Supply CharacteristicsNote: Measurements performed under operating conditions1. Dependent on ap

DS787PP9 14 5.7 Digital Switching Characteristics–XTIFigure 5-1. RESET Timing at Power-onFigure 5-2. RESET Timing after Power is Stable5.7 Digital Swi

15 DS787PP95.8 Digital Switching Characteristics–Internal Clock 5.8 Digital Switching Characteristics–Internal Clock1. After initial power-on reset,

DS787PP9 16 5.10 Digital Switching Characteristics–Serial Control Port–SPI MasterFigure 5-4. Serial Control Port–SPI Slave Mode Timing5.10 Digital Swi

17 DS787PP95.11 Digital Switching Characteristics–Serial Control Port I2C Slave Mode Figure 5-5. Serial Control Port–SPI Master Mode Timing5.11 Digita

DS787PP9 18 5.12 Digital Switching Characteristics–Serial Control Port–I2C MasterFigure 5-6. Serial Control Port–I2C Slave Mode Timing5.12 Digital Swi

19 DS787PP95.13 Digital Switching Characteristics–Digital Audio Slave Input Port 5.13 Digital Switching Characteristics–Digital Audio Slave Input Port

DS787PP9 2 CS47048 Block Diagramx8x4x2x2DAC0textCoyote 32-bit Core in the CS47048 DSPDMASPI / I2CControlI2SADC0/1I2SI2S / S/PDIFPLLROMSRC2Peripheral

DS787PP9 20 5.14 Digital Switching Characteristics–Digital Audio Output PortFigure 5-10. DAO_LRCLK Transition after DAO_SCLK Inactive EdgeFigure 5-11.

21 DS787PP95.15 Digital Switching Characteristics–S/PDIF RX Port 5.15 Digital Switching Characteristics–S/PDIF RX Port(Inputs: Logic 0 = VIL, Logic 1

DS787PP9 22 5.16 ADC Characteristics5.16.2 Analog Input Characteristics (Automotive)Test Conditions (unless otherwise specified): TA = –40–85°C; VDD =

23 DS787PP95.17 DAC Characteristics Figure 5-14. ADC Differential Input Test Circuit5.16.3 ADC Digital Filter Characteristics1. Filter response is gua

DS787PP9 24 5.17 DAC Characteristics5.17.2 Analog Output Characteristics (Automotive)Test Conditions (unless otherwise specified): TA= –40 to +85C; V

25 DS787PP95.17 DAC Characteristics Figure 5-16. DAC Differential Output Test CircuitFigure 5-17. Maximum Loading5.17.3 Combined DAC Interpolation and

26 DS787PP96 Ordering Information 6 Ordering InformationThe CS470xx DSP part numbers are described as follows:Example:CS47048I-XYZRwhere I–ROM ID Lett

27 DS787PP98 Device Pinout Diagrams 8 Device Pinout Diagrams8.1 CS47048, 100-pin LQFP Pinout DiagramFigure 8-1. CS47048 Pinout DiagramVDD1GND2VDDIO1GN

28 DS787PP98.2 CS47028, 100-pin LQFP Pinout Diagram 8.2 CS47028, 100-pin LQFP Pinout DiagramFigure 8-2. CS47028 Pinout DiagramVDD1GND2VDDIO1GNDIO1VDD2

29 DS787PP98.3 CS47024, 100-pin LQFP Pinout Diagram 8.3 CS47024, 100-pin LQFP Pinout DiagramFigure 8-3. CS47024 Pinout DiagramVDD1GND2VDDIO1GNDIO1VDD2

3 DS787PP9 Contacting Cirrus Logic Support For all product questions and inquiries, contact a Cirrus Logic Sales Representative. To find the one neare

DS787PP9 309 100-pin LQFP with Exposed Pad Package DrawingFig. 9-1 shows the 100-pin LQFP package with exposed pad for the CS47048, CS47028, and CS470

31 DS787PP910 Parameter Definitions 10 Parameter Definitions10.1 Dynamic RangeThe ratio of the RMS value of the signal to the RMS sum of all other spe

DS787PP9 32 11 Revision History11 Revision HistoryRevision Date ChangesPP1 August, 2009 Updated Characterization data in Section 5.4, Section 5.7, Sec

DS787PP9 4 1 Documentation Strategy1 Documentation StrategyThe CS470xx Data Sheet describes the CS47048, CS47028, and CS47024 audio processors. This d

5 DS787PP93 Code Overlays 3 Code OverlaysThe suite of software available for the CS470xx family consists of an operating system (OS) and a library of

DS787PP9 6 3 Code OverlaysTable 3-1. CS470xx Device Selection GuideTable 3-2. CS470xx Channel Count1. Contact your Cirrus Logic representative to de

7 DS787PP94 Hardware Functional Description 4 Hardware Functional DescriptionThe CS470xx family, which includes the CS47048, CS47028, and CS47024 DSPs

DS787PP9 8 4 Hardware Functional DescriptionFigure 4-2. CS47028 Top-level Block DiagramFigure 4-3. CS47024 Top-level Block Diagramx8x4x2x2DAC0text32-b

9 DS787PP94.1 Cirrus Logic 32-bit DSP Core 4.1 Cirrus Logic 32-bit DSP CoreThe CS470xx comes with a Cirrus Logic 32-bit core with separate X and Y da