diff options
Diffstat (limited to 'techlibs/common/simcells.v')
| -rw-r--r-- | techlibs/common/simcells.v | 36 |
1 files changed, 16 insertions, 20 deletions
diff --git a/techlibs/common/simcells.v b/techlibs/common/simcells.v index 2bac78d38..157e8d23b 100644 --- a/techlibs/common/simcells.v +++ b/techlibs/common/simcells.v @@ -469,15 +469,14 @@ endmodule //- //- Truth table: S R | Q //- -----+--- -//- 0 0 | x -//- 0 1 | 1 -//- 1 0 | 0 -//- 1 1 | y +//- - 0 | 0 +//- 0 - | 1 +//- - - | q //- module \$_SR_NN_ (S, R, Q); input S, R; output reg Q; -always @(negedge S, negedge R) begin +always @* begin if (R == 0) Q <= 0; else if (S == 0) @@ -493,15 +492,14 @@ endmodule //- //- Truth table: S R | Q //- -----+--- -//- 0 1 | x -//- 0 0 | 1 -//- 1 1 | 0 -//- 1 0 | y +//- - 1 | 0 +//- 0 - | 1 +//- - - | q //- module \$_SR_NP_ (S, R, Q); input S, R; output reg Q; -always @(negedge S, posedge R) begin +always @* begin if (R == 1) Q <= 0; else if (S == 0) @@ -517,15 +515,14 @@ endmodule //- //- Truth table: S R | Q //- -----+--- -//- 1 0 | x -//- 1 1 | 1 -//- 0 0 | 0 -//- 0 1 | y +//- - 0 | 0 +//- 1 - | 1 +//- - - | q //- module \$_SR_PN_ (S, R, Q); input S, R; output reg Q; -always @(posedge S, negedge R) begin +always @* begin if (R == 0) Q <= 0; else if (S == 1) @@ -541,15 +538,14 @@ endmodule //- //- Truth table: S R | Q //- -----+--- -//- 1 1 | x -//- 1 0 | 1 -//- 0 1 | 0 -//- 0 0 | y +//- - 1 | 0 +//- 1 - | 1 +//- - - | q //- module \$_SR_PP_ (S, R, Q); input S, R; output reg Q; -always @(posedge S, posedge R) begin +always @* begin if (R == 1) Q <= 0; else if (S == 1) |