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Added GP_DELAY cell

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Andrew Zonenberg 2016-05-07 21:29:26 -07:00
parent 41bbad4e4c
commit 47eace0b9f
1 changed files with 29 additions and 0 deletions
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29
techlibs/greenpak4/cells_sim.v
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@ -94,6 +94,35 @@ module GP_COUNT14(input CLK, input wire RST, output reg OUT);
endmodule endmodule
module GP_DELAY(input IN, output reg OUT);
parameter DELAY_STEPS = 1;
//TODO: additional delay/glitch filter mode
initial OUT = 0;
generate
//TODO: These delays are PTV dependent! For now, hard code 3v3 timing
//Change simulation-mode delay depending on global Vdd range (how to specify this?)
always @(*) begin
case(DELAY_STEPS)
1: #166 OUT = IN;
2: #318 OUT = IN;
2: #471 OUT = IN;
3: #622 OUT = IN;
default: begin
$display("ERROR: GP_DELAY must have DELAY_STEPS in range [1,4]");
$finish;
end
endcase
end
endgenerate
endmodule
module GP_DFF(input D, CLK, output reg Q); module GP_DFF(input D, CLK, output reg Q);
parameter [0:0] INIT = 1'bx; parameter [0:0] INIT = 1'bx;
initial Q = INIT; initial Q = INIT;