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TMS570LS1227: Power supply requirement for 5 TMS570LS12x HDK

Part Number: TMS570LS1227

Hi,

I have 5 TMS570LS12x HDK that i am using for my project. Currently i have connected the 5 HDK's to the main power through multi-plug junction box. I want to use the bench power supply to get rid of the power adapter that comes with TI HDK kit. This will make my setup bit tidy.

What i kind of want is as below for example,

Could you please kindly recommend  the current settings?

Also, is it OK to connect the 3.3v from one board to the other via a push button for a GIO input(I want to use this as a common switch to trigger the functions in all the HDK's synchronously)?

Sorry i am not a hardware expert, just wanted to get review from the TI experts before i burn anything in the board.

Thanks,

Best Regards,

-Dinesh