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About TUSB1310A's ULPI_CLK

zan zhan
Prodigy 190 points
Other Parts Discussed in Thread: TUSB1310A

I met abnormal cases in my newly designed board with TUSB1310A.

According to TI's datasheet, TUSB1310A's ULPI_CLK will normally output 60MHz Clock.

And in several board of mine, TUSB1310A's ULPI_CLK did output 60MHz Clock normally.

But in several board, two abnormal cases happened.

Case One:  ULPI_CLK did not output clock,  it's output is 0.

Case Two:  ULPI_CLK output is 120MHz

 

I am confused by the abnormal cases, so, could you help me !

Thank you !