Xilinx ISE: Should I be concerned about warning Xst:653?

2
votes

I never mention anything related to GND_3_o or PWR_3_o in my code. What are these signals, should I be concerned about these warnings related to them, and if so, how can I fix them?

WARNING:Xst:653 - Signal <GND_3_o> is used but never assigned. This sourceless signal will be automatically connected to value GND.
WARNING:Xst:653 - Signal <PWR_3_o> is used but never assigned. This sourceless signal will be automatically connected to value GND.
1
vhdlfpgaxilinx-ise
Find out where they are used ... there will be a message "analyzing unit xxx" or some such just before them. If it's a Xilinx IP core, and you're confident you're using it OK, ignore them. Though PWR_3_0 sounds like something that ought to be '1' rather than 0... – user_1818839

1 Answers

0
votes

XST Warning 653 is a critical warning and should be fixed in your design, otherwise some features won't work as expected.

WARNING:Xst:653 - Signal is used but never assigned. This sourceless signal will be automatically connected to value GND.

GND_3_o sounds like an auto generated signal. Elements in vectors ofter get translated to signal names with underscores.