1 files changed, 40 insertions, 0 deletions
diff --git a/manual/PRESENTATION_ExSyn/abc_01_cells.v b/manual/PRESENTATION_ExSyn/abc_01_cells.v
new file mode 100644
index 000000000..444094798
--- /dev/null
+++ b/manual/PRESENTATION_ExSyn/abc_01_cells.v
@@ -0,0 +1,40 @@
+
+module BUF(A, Y);
+input A;
+output Y = A;
+endmodule
+
+module NOT(A, Y);
+input A;
+output Y = ~A;
+endmodule
+
+module NAND(A, B, Y);
+input A, B;
+output Y = ~(A & B);
+endmodule
+
+module NOR(A, B, Y);
+input A, B;
+output Y = ~(A | B);
+endmodule
+
+module DFF(C, D, Q);
+input C, D;
+output reg Q;
+always @(posedge C)
+	Q <= D;
+endmodule
+
+module DFFSR(C, D, Q, S, R);
+input C, D, S, R;
+output reg Q;
+always @(posedge C, posedge S, posedge R)
+	if (S)
+		Q <= 1'b1;
+	else if (R)
+		Q <= 1'b0;
+	else
+		Q <= D;
+endmodule
+