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Type: Posts; User: aidyw

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    Access to all 3 I2S modules on Teensy 4.0

    Hi,
    A quick questions. I see from the user manual of the NXP chip used on the Teensy4 that it actually has 3 I2S modules. The specs for the Teensy 4.0 states only 2 I2S are broken out. I assume that...
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    Hi, I never truly solved it. Every step I took...

    Hi,
    I never truly solved it. Every step I took made subtle improvements but in the end I came to the conclusion that it is what it is. The CODEC itself does not have exactly hi-fi quality datasheet...
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    Paul, I thought I would let you know a couple of...

    Paul, I thought I would let you know a couple of things.

    Regarding the noisy SGTL5000. I did find a little something, quite interesting. The CODEC has a debug register, one of the options is to...
  4. A little follow up on this suggestion. Firstly it...

    A little follow up on this suggestion. Firstly it does not work simply by tieing the GPIO pin from K20 onto the program pin. The K20 only manages to assert LOW for 100uS. It is not long enough, this...
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    Hi Paul et al, Just wanted to let you know. I...

    Hi Paul et al,
    Just wanted to let you know. I have totally re-written my driver library for the mbed platform. It now uses DMA. Much better I feel. I have published it and it is available here:
    ...
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    I just wanted to add, there seems also to be...

    I just wanted to add, there seems also to be rather obvious problems with channel separation with the SGTL5000. I was hoping to try using the L & R channels as differential inputs, as I only need one...
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    Hi All, Well this little codec is stubborn. I...

    Hi All,
    Well this little codec is stubborn. I just would like to run a few questions by you all, see if you have any experience beyond my experiments. Having looked at the specs of the SGTL5000,...
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    Thanks guys, I would have been surprised if it...

    Thanks guys, I would have been surprised if it was not there. But very glad you have proved it. As to the question of quality. I will approach this from the supply lines first now I know the AAF is...
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    Anti Alias filters on SGTL5000

    Does anyone know if the SGTL5000 has anti-alias filters in the analogue gain stage before its ADC. The reason I ask is simple enough. I am fighting to get noise levels to an acceptable level. I have...
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    Thanks, Hmm, I don't think this helps. They are...

    Thanks,
    Hmm, I don't think this helps. They are talking about latency of over 6mS, this is an order of magnitude off the mark. It would make it totally useless in my application. But it's not real...
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    Thanks, what the library supports and what the...

    Thanks, what the library supports and what the chip can do are not the same, but thanks for the heads up.
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    Audio Adapter SGTL5000 Group Delay

    Hi,
    I'm very interested to use the audio adapter (SGTL5000) in a servo control project. Having read the datasheet from cover to cover, I am still having to make a very important assumption about the...
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