Texas Instruments TAS3002 manual 1.3Functional Block Diagram

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•Two I2C-selectable, single-ended analog input stereo channels

•Equalization bypass mode

•Single 3.3-V power supply

•Power down without reloading the coefficients

•Sampling rates of 32 kHz, 44.1 kHz, or 48 kHz

•Master clock frequency of 256fS or 512fS

•Can have crystal input to replace MCLK. Crystal input frequency is 256fS.

•Six GPI terminals for volume, bass, treble up/down control, mute, and selection of equalization filters

1.3Functional Block Diagram

Figure 1−1 is a block diagram showing the major functions of the TAS3002.

1−2

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Contents Data Manual TAS3002Digital Audio Processor With Codec 2001IMPORTANT NOTICE 1 Introduction 1.2Features1.1 Description 1.3Functional Block Diagram Figure 1−1. TAS3002 Block Diagram 1.4 Terminal Assignments 1.5 Terminal FunctionsFigure 1−2. TAS3002 Terminal Assignments Table 1−1. TAS3002 Terminal FunctionsTable 1−1. TAS3002 Terminal Functions Continued Page 2.1 Serial Interface Formats 2 Audio Data FormatsTable 2−1. Serial Interface Options … … … … 2.2 Digital Output Modes… … … … … … … …2.2.2I2S Serial-InterfaceFormat Figure 2−2. I 2S Serial-InterfaceFormat… … … … … … … …2.2.3MSB-Left-Justified, Serial-InterfaceFormat … … … …… … … … … … … …2.3 Switching Characteristics PARAMETERUNIT tcSCLK SCLK LRCLK tdSDOUT SDOUT1 SDOUT2 SDOUT0Page 3 Analog Input/Output 3.1 Analog Input3.2 Analog Output 3.2.1Direct Analog OutputFigure 3−2. VCOM Decoupling Network 3.2.2Analog Output With GainFigure 3−3. Analog Output With External Amplifier TAS3002 3.2.3Reference Voltage FilterFigure 3−4. TAS3002 Reference Voltage Filter Page 4.1 Soft Volume Update 4 Audio Control/Enhancement Functions4.2 Software Soft Mute 4.3 Input Mixer Control4.5 Treble Control 4.4 Mono Mixer ControlFigure 4−1. TAS3002 Mixer Function 4.7 De-EmphasisMode DM 4.6 Bass ControlFigure 4−2. De-EmphasisMode Frequency Response 4.8 Analog Control Register 40h Table 4−1. Analog Control Register Description4.9 Dynamic Loudness Contour 4.9.1Loudness Biquads4.9.2Loudness Gain 4.9.3Loudness Contour Operation4.10 Dynamic Range Compression/Expansion DRCE 4.11 AllPass Function4.12 Main Control Register 1 01h 4.13 Main Control Register 2 43hTable 4−2. Main Control Register 1 Description Table 4−3. Main Control Register 2 DescriptionPage Figure 5−1. Biquad Cascade Configuration 5 Filter Processor5.1 Biquad Block 5.1.1Filter CoefficientsPage 6 I2C Serial Control Interface 6.1 Introduction6.2 I2C Protocol Figure 6−1. Typical I 2C Data Transfer Sequence6.3 Operation 6.3.1Write Cycle ExampleTable 6−1. I 2C Protocol Definitions Table 6−2. I 2C Address Byte Table6.3.2TAS3002 I2C Readback Example 6.3.3I2C Wait States6.4 SMBus Operation 6.4.1Block Write Protocol6.4.2Write Byte Protocol Table 6−3. I 2C Wait States6.4.3Wait States 6.4.4TAS3002 SMBus ReadbackPage 7.2 Power-Up/Power-DownReset 7.2.1Power-UpSequence7.2.2Reset 7 Microcontroller Operation7.2.3Reset Circuit Figure 7−1. TAS3002 Reset Circuit7.2.4Fast Load Mode TAS30027.3 Power-DownMode 7.2.5Codec Reset7.3.1Power-DownTiming Sequence Figure 7−2. Power-DownTiming Sequence7.4 Test Mode 7.5 Internal Interface7.6.2GPI Architecture Table 7−1. GPI Terminal ProgrammingFigure 7−3. Internal Interface Flow Chart Restore Volume and MCRStart Power Up Initialize Default EEPROM Slave Write GPI Power Down7.7 External EEPROM Memory Maps Table 7−2. 512-ByteEEPROM Memory Map 2.0 ChannelsADDRESS BYTE NUMBERFUNCTION TAS3002TAS3002 ADDRESS NUMBERFUNCTION CATEGORYTAS3002 ADDRESS NUMBERFUNCTION CATEGORYStatic Digital Specifications 8 Electrical Characteristics8.2 Recommended Operating Conditions Figure 8−1. ADC Digital Filter Characteristics 8.4 ADC Digital FilterFigure 8−4. ADC High-PassFilter Characteristics 8.5 Analog-to-DigitalConverter8.6 Input Multiplexer 8.7 DAC Interpolation Filter8.8 Digital-to-AnalogConverter 8.9 DAC Output Performance Data8.10 I2C Serial Port Timing Characteristics Figure 8−7. I 2C Bus Timing9 System Diagrams Figure 9−1. Stereo ApplicationTAS3002 ClockFigure 9−2. TAS3002 Device, 2.1 Channels TAS3001TAS3002 PFB S-PQFP-G48 10 Mechanical InformationPLASTIC QUAD FLATPACK 10−2