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coolrunner2: Initial mapping of DFFs

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All DFFs map to either FDCP (matches Xilinx) or a custom FDCP_N
(negative-edge triggered)
This commit is contained in:
Robert Ou 2017-06-25 20:16:43 -07:00
parent 1eb5dee799
commit 4af5baab21
4 changed files with 76 additions and 0 deletions
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31
techlibs/coolrunner2/xc2_dff.lib Normal file
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@ -0,0 +1,31 @@
library(xc2_dff) {
cell(FDCP) {
area: 1;
ff("IQ", "IQN") { clocked_on: C;
next_state: D;
clear: "CLR";
preset: "PRE"; }
pin(C) { direction: input;
clock: true; }
pin(D) { direction: input; }
pin(Q) { direction: output;
function: "IQ"; }
pin(CLR) { direction: input; }
pin(PRE) { direction: input; }
}
cell(FDCP_N) {
area: 1;
ff("IQ", "IQN") { clocked_on: "!C";
next_state: D;
clear: "CLR";
preset: "PRE"; }
pin(C) { direction: input;
clock: true; }
pin(D) { direction: input; }
pin(Q) { direction: output;
function: "IQ"; }
pin(CLR) { direction: input; }
pin(PRE) { direction: input; }
}
}