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Detecting NACK from invalide adresse (target absent) VS Empty Data in I3C

moataz-ltaiaf
Associate

‎2025-06-19 12:18 PM - edited ‎2025-06-19 12:23 PM

Hello,
I’m currently working with I3C communication using STM32H7S3L8 and encountered a case where the controller (master) sends a read request, but the target either does not respond or sends no data. This section explains: How to distinguish a NACK caused by an invalid address(target absent) from a situation where the target is present but hasn't provided data. How to ensure the controller receives 0x00 when the target has nothing to send.
thanks in advance for your contributions!

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Foued_KH
ST Employee

‎2025-09-12 3:07 AM

Hi @moataz-ltaiaf , 

Could you please provide more details about your case, including the hardware setup and configuration, such as frequency?

Foued 

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