diff options
Diffstat (limited to 'techlibs/common/gen_fine_ffs.py')
| -rw-r--r-- | techlibs/common/gen_fine_ffs.py | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/techlibs/common/gen_fine_ffs.py b/techlibs/common/gen_fine_ffs.py index 5d331e767..25c6ef171 100644 --- a/techlibs/common/gen_fine_ffs.py +++ b/techlibs/common/gen_fine_ffs.py @@ -133,6 +133,55 @@ endmodule """ // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| //- +//- $_ALDFF_{C:N|P}{L:N|P}_ (D, C, L, AD, Q) +//- +//- A {C:negative|positive} edge D-type flip-flop with {L:negative|positive} polarity async load. +//- +//- Truth table: D C L AD | Q +//- ----------+--- +//- - - {L:0|1} a | a +//- d {C:\\|/} - - | d +//- - - - - | q +//- +module \$_ALDFF_{C:N|P}{L:N|P}_ (D, C, L, AD, Q); +input D, C, L, AD; +output reg Q; +always @({C:neg|pos}edge C or {L:neg|pos}edge L) begin + if (L == {L:0|1}) + Q <= AD; + else + Q <= D; +end +endmodule +""", +""" +// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| +//- +//- $_ALDFFE_{C:N|P}{L:N|P}{E:N|P}_ (D, C, L, AD, E, Q) +//- +//- A {C:negative|positive} edge D-type flip-flop with {L:negative|positive} polarity async load and {E:negative|positive} +//- polarity clock enable. +//- +//- Truth table: D C L AD E | Q +//- ------------+--- +//- - - {L:0|1} a - | a +//- d {C:\\|/} - - {E:0|1} | d +//- - - - - - | q +//- +module \$_ALDFFE_{C:N|P}{L:N|P}{E:N|P}_ (D, C, L, AD, E, Q); +input D, C, L, AD, E; +output reg Q; +always @({C:neg|pos}edge C or {L:neg|pos}edge L) begin + if (L == {L:0|1}) + Q <= AD; + else if (E == {E:0|1}) + Q <= D; +end +endmodule +""", +""" +// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| +//- //- $_DFFSR_{C:N|P}{S:N|P}{R:N|P}_ (C, S, R, D, Q) //- //- A {C:negative|positive} edge D-type flip-flop with {S:negative|positive} polarity set and {R:negative|positive} |