ID:13030 Reduced the following open-drain buffers that are fed by GND
CAUSE: The design contains one or more open-drain buffers that are fed by the constant
GND
. Essentially, the output pins that these open-drain buffers drive will always have the value GND
. As a result, the Quartus Prime software replaced the fanout from the open-drain buffers to the output pins with the constant GND
. For example, this situation occurs in the following Verilog design:
module test (output out);
wire gnd;
assign gnd = 1'b0;
OPNDRN my_opndrn (.in(gnd), .out(out));
endmodule
See the sub-messages below to view a list of the removed open-drain buffers. ACTION: Either remove the specified open-drain buffer from the design or drive it from a non-constant driver.