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New ContributorDevice Migration - does it work with some power pins not connected?
I have a design which was originally for an EP4CE40F23, and now I want to migrate to EP4CE55F23. I can compile the design correctly (i.e. I am not having used any I/O pins which are not available in the larger device).
However, my existing boards have these pins unconnected and not connected to VCC/VCCINT/GND etc. Does the larger device still works on the board (i.e. because its power pins are internally connected) or do I need to redesign the board to have the supply on ALL these pins?
6 Replies
AminT_IntelRegular Contributor
Hello,
I believe you still have to connect to VCC/VCCINT/GND etc.
Thank you.
REicsAre you sure the pins are not tied together internally? For Xilinx devices, that seems to be the case:
https://support.xilinx.com/s/article/22338?language=en_US- AminT_Intel
Hello,
I am unable to validate that based on other company's device. I would recommend you to refer to our FPGA handbook/device datasheet on your design.
Thank you.
SeadogOccasional Contributor
I would never leave power or ground pins unconnected. You will have more switching noise on the chip, which may cause malfunctions which you will have to explain to your boss.
- AminT_Intel
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