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TUSB9261, GRSTx pin is strange phenomenon at the starting up.

Other Parts Discussed in Thread: TUSB9261

Dear Specialists,

My customer is evaluating TUSB9261.

Some devices is strange phenomenon at the powering up.

Could you please advise?

---quesion---

(1) GRTSz(4pin) action

Although reset  event is executed 70ms after powering on, actual reset is going high level during 205ms,

and then going back to low.

This means GRSTx outputs low despite an input pin. It may cause a collision.

The input  to the GRSTz keeps high level.

So is this output phenomenon correct or not?

(2) Some devices can't reset .(5/228)

Even though the input to the GRSTz is high, it can't be reset rarely.

Could you please advise what Is the reason?

I appreciate your great help.

Best regards,

Shinichi

question about TUSB9261.pdf