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TAS2505: Settings for registers

user777540
Expert 1020 points
Part Number: TAS2505


Hello,


If the VBUS power is turned off, will the settings be lost and return to default values?
What are the conditions for setting to default values?

  • 0
    TI__Guru* 84915 points

    Hello,

    My colleague will take a look at this and will answer as soon as possible.

    Best regards,
    Luis Fernando Rodríguez S.

  • 0
    TI__Mastermind 22312 points

    Hello, 

    A1:

    In the Application Reference Guide, Section 3.2.2: Device Start-Up Lockout Times, states: "After the TAS2505 is initialized through the power up process, the internal memories are initialized to default values."

    Therefore if VBUS is powered off, and powered back on, using a correct power on sequence, then the registers will be set to default values. 

    A2:

    Section 3.2.1 also covers the conditions for setting to default values between /RST and POR along with a software reset. 

    Section 2.4.11 states:  "/RST pin resets I2C, I2S, signal processing and all registers. POR resets I2C, I2S, signal processing and all registers. SW reset from register bit only resets the signal processing and all registers but not digital interfaces."

    If you are using the speaker driver: Section 2.4.8.2 discusses what conditions to properly reset. "Resetting can be done in two ways. First, the device master reset can be used, which requires either toggling the RST pin or using the software reset. If master reset is used, it resets all of the registers. Second, a dedicated speaker power-stage reset can be used that keeps all of the other device settings. The speaker power-stage reset is done by setting page 1, register 45, bit D1 for SPKP and SPKM. If the fault condition has been removed, then the device returns to normal operation."

    If you are using the headphone driver: Section 2.4.8.1 discusses what conditions to properly reset. "Resetting can be done in two ways. First, the device master reset can be used, which requires either toggling the RST pin or using the software reset. If master reset is used, it resets all of the registers. Second, a dedicated headphone power-stage reset can also be used to re-enable the output stage, and that keeps all of the other device settings. The headphone power stage reset is done by setting page 1, register 9, bit D5 for HPOUT. If the fault condition has been removed, then the device returns to normal operation."

    Please let me know if you have additional questions. 

    All the best, 

    Carolina Gomez