Altera_Forum
Honored Contributor
15 years ago[bug report QII 9.1] HDL srff primitive incorrect implemented
Hi. i`m not know where to post an QII issues, therefore try to post it here.
My shema used srff primitive. in created HDL file his primitive post like: always @(posedge clock) begin q <= ~q&s | q&~r end this behaviour is incorrect, and it easy to see. if trigger states in undefined state (q == X), it cant be stated in valid state any how, not matter what values on S or R inputs. (lpm implementation of srff is valid.) do not use srff primitive!!!!.