01-07-2019 07:28 AM
I'm searching what is the PS_DONE interface inside the zynq (Open drain...). The goal is to know if I can connect PS_DONE signal for turn ON a LED throught a transistor for exemple.
01-07-2019 02:24 PM
The Xilinx documentation is not entirely clear regarding this pin.
The TRM reports the pin simply as an "Output", without specifying whether it's an open-drain or totem-pole output.
The Xilinx PCB checklist, however, recommends that a pull-up be attached to the pin.
When in doubt, do what they do. Just copy a circuit from a reference board, like this ZCU102:
01-08-2019 12:11 AM
Thanks for your reply but I already made the same search as you.
Nevertheless, I don't want just copy and add a new reference on my board if I can make the same function with transistors for exemple.