SLASF29A January   2022  – October 2024 TAA5242

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements: TDM, I2S or LJ Interface
    7. 5.7 Switching Characteristics: TDM, I2S or LJ Interface
    8. 5.8 Timing Diagrams
    9. 5.9 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Hardware Control
      2. 6.3.2 Audio Serial Interfaces
        1. 6.3.2.1 Time Division Multiplexed Audio (TDM) Interface
        2. 6.3.2.2 Inter IC Sound (I2S) Interface
        3. 6.3.2.3 Left-Justified (LJ) Interface
      3. 6.3.3 Phase-Locked Loop (PLL) and Clock Generation
      4. 6.3.4 Analog Input Configurations
      5. 6.3.5 Reference Voltage
      6. 6.3.6 Integrated Microphone Bias
      7. 6.3.7 Signal-Chain Processing
        1. 6.3.7.1 Configurable Digital Decimation Filters
          1. 6.3.7.1.1 Linear-phase filters
            1. 6.3.7.1.1.1 Sampling Rate: 8kHz or 7.35kHz
            2. 6.3.7.1.1.2 Sampling Rate: 16kHz or 14.7kHz
            3. 6.3.7.1.1.3 Sampling Rate: 24kHz or 22.05kHz
            4. 6.3.7.1.1.4 Sampling Rate: 32kHz or 29.4kHz
            5. 6.3.7.1.1.5 Sampling Rate: 48kHz or 44.1kHz
            6. 6.3.7.1.1.6 Sampling Rate: 96kHz or 88.2kHz
            7. 6.3.7.1.1.7 Sampling Rate: 192kHz or 176.4kHz
          2. 6.3.7.1.2 Low-latency Filters
            1. 6.3.7.1.2.1 Sampling Rate: 24kHz or 22.05kHz
            2. 6.3.7.1.2.2 Sampling Rate: 32kHz or 29.4kHz
            3. 6.3.7.1.2.3 Sampling Rate: 48kHz or 44.1kHz
            4. 6.3.7.1.2.4 Sampling Rate: 96kHz or 88.2kHz
            5. 6.3.7.1.2.5 Sampling Rate: 192kHz or 176.4kHz
        2. 6.3.7.2 Programmable Digital High-Pass Filter
    4. 6.4 Device Functional Modes
      1. 6.4.1 Active Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Application
      2. 7.2.2 Design Requirements
      3. 7.2.3 Detailed Design Procedure
      4. 7.2.4 Application Performance Plots
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.3.2 Audio Serial Interfaces

Digital audio data flows between the host processor and the TAA5242 on the digital audio serial interface (ASI), or audio bus. This bus can be operated in target or controller mode through pin control. The ASI supports TDM mode for multichannel operation, I2S and Left-Justified (LJ) bus protocols. The data is in MSB-first, two's-complement pulse code modulation (PCM) format, with pin-selectable word-length configuration.

The device supports an audio bus controller or target mode of operation using the hardware pin MD0. In target mode, FSYNC and BCLK work as input pins whereas in controller mode, FSYNC and BCLK work as output pins generated by the device. Table 6-2 shows the controller and target mode selection using the MD0 pin.

Table 6-2 Controller and Target Mode Selection
MD0 CONTROLLER AND TARGET SELECTION
Short to Ground Target I2S Mode
Short to Ground with 4.7K Ohms Target TDM Mode
Short to AVDD Controller I2S Mode
Short to AVDD with 4.7K Ohms Controller TDM Mode
Short to AVDD with 22K Ohms Target LJ Mode
The word length for audio serial interface (ASI) in TAA5242 can be selected through MD1 and MD2 Pins in target mode of operation. In controller mode, fixed word length of 32 bits is supported. The TAA5242 also supports 1.8V AVDD operation in target mode with 32-bit word length. Table 6-3 shows the configuration table for setting word length, AVDD supply voltage and decimation filter type applicable in Target Mode. In controller mode, AVDD supply mode is 3.3V, word length of 32-bits is supported, decimation filter is configured in the linear-phase and the MD1 and MD2 Pins control the system clock configuration described in Table 6-9.
Table 6-3 Word Length, Supply Mode and Decimation Filter Selection
MD2 MD1 WORD LENGTH, SUPPLY MODE, AND INTERPOLATION FILTER SELECTION (Valid for Target Mode only)
Low Low AVDD = 3.3V, Word Length = 32, Linear-phase decimation filter
Low High AVDD = 1.8V, Word Length = 32, Linear-phase decimation filter
High Low AVDD = 3.3V, Word Length = 24, Linear-phase decimation filter
High High AVDD = 3.3V, Word Length = 32, Low-latency decimation filter
The TAA5242 also offers daisy chain configuration for target TDM mode of operation. This can be selected through MD3 pin when MD0 is configured in target TDM mode. In this mode, MD6 can be used as Daisy chain data input. Table 6-4 shows the daisy chain configuration in Target TDM mode of operation based on MD3 pin. When enabled, for a TDM with N slots, the device plays the audio present on the last 2 slots, and the remaining slots are shifted to the right and sent on the MD6 pin. An example for this is shown in Figure 6-2.
Table 6-4 Daisy Chain Selection for Target TDM Mode
MD3 DAISY CHAIN
Low Disable
High Enable
TAA5242 Daisy Chain in TDM Mode Block Diagram Figure 6-2 Daisy Chain in TDM Mode Block Diagram
The MD3 pin acts as the controller clock (CCLK) input when the device is configured in controller mode through MD0 pin to set the system clocks as described in Section 6.3.3.