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GD75232: TX side Glitch

Shu-Cheng LIN
Guru 11785 points
Part Number: GD75232

Hi Sirs,

Sorry to bother you.

We found there have glitch on TX side output when turn on/off system, 

Could you help check is because of voltage level transfer? 

By the way, TX between interface and SIO, the turn on/off waveform as below

  • 0
    TI__Mastermind 25705 points
    Shu-Cheng,

    First of all, please follow the power up sequence recommended in the data sheet. The waveforms you showed during power on/off look like normal behavior of the device. You can refer to this post e2e.ti.com/.../609497 for related discussion. Basically during transition, in a short time the state of the internal circuit is undermined, which makes the TX output follow Vdd. Please let me know if it makes sense to you.

    Regards,
    Hao