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TMS320F28031: Question about the initialization time of SCI

Part Number: TMS320F28031
Other Parts Discussed in Thread: UNIFLASH,

Dear team:

My customer burned the same program into two chips of the same model(PCB is also the same) with the uniflash of the same computer, he used an oscilloscope to check the status of the chip's TX pin and found that one of them would be pulled low after 200ms of power-on, while the other would take 300ms to be pulled low.

Does this mean that one chip's SCI module initialization takes 200ms, while the other takes 300ms?

If so, why the same chip and program have different module initialization times?

The 200ms chip is: tms320f28031 g4a 3aasfhw

The 300ms chip is: tms320f28031 g4a 78a7

Best regards,