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SRC4190-Q1: Input/Output Audio Formats

Masaru Oinaga
Expert 4565 points
Part Number: SRC4190-Q1


Hello, Team,

We have 3 questions about input and output of SRC4190-Q1.

  1. When input audio format is set to 24 bit I2S and actual inputted data is 16bit I2S, would there be a problem?
  2. With the above setting, can we set output format to 16bit I2S?
  3. How is the data processed with above settings?
    Are there any other descriptions on how it is processed than datasheet

Input data format setting : 24bit I2S
Input data format : 16bit I2S
Output data format: 16bit I2S

Best Regards,
Masaru

  • +1
    TI__Mastermind 32351 points

    Hello,

    In general when the slot is longer than the actual word width, it will be padded with zeros. So you can have a 16bit data for a 24bit slot, the extra  empty slots will be  zeros.

    you can have 16bit I2S  output as well. please refer to user's guide  (SBAU088)  to set up as the following guide:

    Table 3–2. SRC419x Input & Output Port Data Format Configuration
    IFMT2 IFMT1 IFMT0   Input Port Data Format
    LO LO LO     24–Bit Left Justified
    LO LO HI      24–Bit I2S
    LO HI LO      Unused
    LO HI HI        Unused
    HI LO LO      16–Bit Right Justified
    HI LO HI       18–Bit Right Justified
    HI HI LO       20–Bit Right Justified
    HI HI HI        24–Bit Right Justified

    OFMT1 OFMT0       Output Port Data Format
    LO LO                     Left Justified
    LO HI                       I2S
    HI  LO                      TDM
    HI  HI                        Right Justified
    OWL1 OWL0 Output Port Data Word Length
    LO LO 24–Bits
    LO HI 20–Bits
    HI HI  16–Bits
    HI  LO  18–Bits

    Kind regards,

    Arash

  • 0 in reply to Arash Loloee
    TI__Expert 4565 points

    Hello, Arash,

    Thank you very much for your quick support!

    Best Regards,
    Masaru