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TAS5756M HybridFlow Processor

Reinhard F.
Prodigy 80 points
Other Parts Discussed in Thread: TAS5756M

Hello,

I have already tried to find answers to my questions in the datasheet of the amplifier as well as in the "HybridFlow Processor" manual (SLA577), but I still have some left and so I hope that you can help me with the following things.

1.) How is the program loaded into the HybridFlow Processor?

Is it necessary to buy the "PurePath Console Motherboard (PPCMB)" to configure the DSP? If yes, how am I supposed to connect the motherboard to my own amplifier board (not the EVM)? Do I need to include the same connector that can be found on the EVM on my PCB or is there a different (simpler) way?

2.) Can certain "HybridFlow" settings be changed during operation?

In other words, can parameters like bass, treble and maybe balance be changed via I²C without reprogramming the DSP (and without using the GUI)?

If the amplifier on its own is not capable of this, how could I add this functionality to my project (maybe with an additional IC between the DAC-out and the input of the actual amplifier stage)?

3.) Is it possible to amplify/mix a stereo signal in PBTL-Mode?

I want to drive a single speaker in mono-mode (PBTL), with a stereo signal at the input of the amplifier. Can this be done using the internal DSP or will I have to use external circuitry?

I really appreciate any help you can provide.

Greetings from Austria
Reinhard F.

  • 0
    TI__Mastermind 34665 points

    Hi Reinhard,

    Please see my response to your questions below:

    1.) How is the program loaded into the HybridFlow Processor? Use the EVM with software GUI to develop HF process and settings then you can do a register dump on the settings to a file and use the register dump file to load and the your board processor to download the setting to the TAS5756M device on your board. Register dump details can be found in SLA577 document. 

    Is it necessary to buy the "PurePath Console Motherboard (PPCMB)" to configure the DSP? If yes, how am I supposed to connect the motherboard to my own amplifier board (not the EVM)? Do I need to include the same connector that can be found on the EVM on my PCB or is there a different (simpler) way? Yes you need PPCM. I describe above how to get the setting to the device on your board using register dump settings and your board host processor to load settings via I2C.

    2.) Can certain "HybridFlow" settings be changed during operation? Settings/coefficients within an HF can be change during operation like PEQ gain, response, etc., but you can't change process flow (HFs) during operation. This will be more obvious when you setup the EVM and work with our GUI.

    In other words, can parameters like bass, treble and maybe balance be changed via I²C without reprogramming the DSP (and without using the GUI)? Yes once you know the I2C settings to be update. Our GUI can help you figure out the I2C commands needed for your desired settings.  

    If the amplifier on its own is not capable of this, how could I add this functionality to my project (maybe with an additional IC between the DAC-out and the input of the actual amplifier stage)? All you need is a host processor to configure TAS5756M or you can use the I2C from the PPCMB to do the I2C programming of your device on your board during debug. You do need to have the EVM connected, but TAS5756M should be a different I2C address than the EVM device. Our GUI allows you to pick wish I2C address to want to communicate with. 

    3.) Is it possible to amplify/mix a stereo signal in PBTL-Mode? Yes using HF4 in our GUI gives you the option of mixing L and R channel data for mono output channels.

    I want to drive a single speaker in mono-mode (PBTL), with a stereo signal at the input of the amplifier. Can this be done using the internal DSP or will I have to use external circuitry? See our datasheet, EVM User Guide/schematic for reference device configuration for PBTL application. Our EVM has two device on it. One is stereo and the other is Mono.

    Goto http://cc.ext.ti.com/ to download our GUI exe and plugin for TAS5756M. 

  • 0 in reply to Damian Lewis
    Prodigy 80 points
    Hello Damian,

    Thank you very much for these detailed explanations – you have helped me a lot.

    Regards,
    Reinhard F.