PicoScope 7 Software
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I2S LRCLK Glitch
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myamigoseh
- Newbie
- Posts: 0
- Joined: Tue Nov 19, 2019 5:57 pm
I2S LRCLK Glitch
I have my 5443D MSO scope setup to monitor an 8-channel I2S interface (4 stereo signals). Connected as follows:
ANALOG
CH A: SCLK
CH B: LRCLK
DIGITAL
D0: SDATA0
D1: SDATA1
D2: SDATA2
D3: SDATA3
D4: LRCLK
D5: SCLK
I am seeing glitching on the digital version of LRCLK (D4) that is not evident on the analog (CH B is clean). I've attached an image of the PicoScope output which clearly shows this as well as a psdata file which can be used for detailed inspection.
This is completely messing up the decoded data so I don't have confidence in what I'm seeing. I can get by this for now by using the analog versions of SCLK & LRCLK but I need to free them up for other signal inspection.
Can someone look into this please? I submitted a report using the online feedback form but I have not received a response.
ANALOG
CH A: SCLK
CH B: LRCLK
DIGITAL
D0: SDATA0
D1: SDATA1
D2: SDATA2
D3: SDATA3
D4: LRCLK
D5: SCLK
I am seeing glitching on the digital version of LRCLK (D4) that is not evident on the analog (CH B is clean). I've attached an image of the PicoScope output which clearly shows this as well as a psdata file which can be used for detailed inspection.
This is completely messing up the decoded data so I don't have confidence in what I'm seeing. I can get by this for now by using the analog versions of SCLK & LRCLK but I need to free them up for other signal inspection.
Can someone look into this please? I submitted a report using the online feedback form but I have not received a response.
Re: I2S LRCLK Glitch
can you post a psdata file ?
O a download link to the psdata file.
Benno
O a download link to the psdata file.
Benno
Re: I2S LRCLK Glitch
Do you have any of the digital port ground cables connected ?
Can you try putting the LRCLK on the other digital bank.
Can you try putting the LRCLK on the other digital bank.
Martyn
Technical Support Manager
Technical Support Manager
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myamigoseh
- Newbie
- Posts: 0
- Joined: Tue Nov 19, 2019 5:57 pm
Re: I2S LRCLK Glitch
I forgot connect digital ground. All good now!