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TMS320F28377D: Question about power sequence

Julia Li
Expert 3880 points
Part Number: TMS320F28377D

Tool/software:

Hi Champs,

I ask this for customer.

Now customer wondering why it's not VDD that precedes VDDIO in our power sequence. In the customer's understanding, it should be the kernel that is powered on first to ensure that the program is running, and then the power of the IO is turned on, to ensure that the IO is controllable. Can you help explain why VDDIO needs to be powered on first?

Thanks!

Julia