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About the at detection of LTC4265

First of all, the customer's configuration uses a bt standard compliant module for PSE and LTC4265 for PD side.

In this case, the power can be supplied, but the AT detection flag (T2PSE pin) of the LTC4265 is reset on the third pulse, so the PSE recognizes it as AT, but the PD controller does not show the AT flag.

Is this a possible behavior of the LTC4265?
Also, if I want to avoid this problem, is there any other way except for bt standard compatible ones?

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