Note: This question does not apply to I3C Basic v1.0.

No. The tSCO (Clock to Data Turnaround delay time) is information provided by Slaves so that system designers can properly compute the maximum effective frequency for reads on the Bus. The tSCO number is meant to be used together with the line capacitance (trace length) and number of Slaves and stubs (if present).

However, I3C Slaves with tSCO delay greater than 12 ns must:

  • Set the Limitation bit in the Bus Characteristics Register (BCR) to 1’b1,
  • Set the Clock-to-Data Turnaround field of the maxRD Byte to 3’b111, and
  • Communicate the tSCO value to the Master by private agreement (i.e., product datasheet). 
  • I3C Basic v1.0 already clarifies this.
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