diff --git a/synthDC/scripts/synth.tcl b/synthDC/scripts/synth.tcl
index 5ceb577b7..4d444682a 100755
--- a/synthDC/scripts/synth.tcl
+++ b/synthDC/scripts/synth.tcl
@@ -119,12 +119,14 @@ if {$tech == "sky130"} {
 } elseif {$tech == "sky90"} {
     if {$drive == "INV"} {
 	set_driving_cell -lib_cell scc9gena_inv_1 -pin Y $all_in_ex_clk
-    } else {
+    } elseif {$drive == "FLOP"} {
 	set_driving_cell  -lib_cell scc9gena_dfxbp_1 -pin Q $all_in_ex_clk
     }
 } elseif {$tech == "tsmc28"} {
     if {$drive == "INV"} {
 	set_driving_cell -lib_cell INVD1BWP30P140 -pin ZN $all_in_ex_clk
+    } elseif {$drive == "FLOP"} {
+    set_driving_cell -lib_cell DFQD1BWP30P140 -pin Q $all_in_ex_clk
     }
 }
 
@@ -138,12 +140,14 @@ if {$tech == "sky130"} {
 } elseif {$tech == "sky90"} {
     if {$drive == "INV"} {
 	set_load [expr [load_of scc9gena_tt_1.2v_25C/scc9gena_inv_4/A] * 1] [all_outputs]
-    } else {
+    } elseif {$drive == "FLOP"} {
         set_load [expr [load_of scc9gena_tt_1.2v_25C/scc9gena_dfxbp_1/D] * 1] [all_outputs]
     }
 } elseif {$tech == "tsmc28"} {
     if {$drive == "INV"} {
 	set_load [expr [load_of tcbn28hpcplusbwp30p140tt0p9v25c/INVD4BWP30P140/I] * 1] [all_outputs]
+    } elseif {$drive == "FLOP"} {
+        set_load [expr [load_of tcbn28hpcplusbwp30p140tt0p9v25c/DFQD1BWP30P140/D] * 1] [all_outputs]
     }
 }