#234 Hierarchical extraction on pin/labels without drawing incomplete Issue created by d-m-bailey This occurs in slot-031 of mpw-8. The reram array has a met2 strap to

SEL

in the base

cell_1t1r_lv

reram cell. In neighboring placements of the

cell_1t1r_lv

cells in

subRA_2R2C

,

SEL<0:1>

are connected correctly.

.subckt NJ_YH_cell_1t1r_lv_0 SEL N P VSUBS
X0 N SEL a_65_65# VSUBS sky130_fd_pr__nfet_01v8 ad=0.4 pd=2.68 as=0.125 ps=1.17 w=0.89 l=0.15 M=2
X1 P a_65_65# sky130_fd_pr__reram_reram_cell area_ox=0.0254
.ends

.subckt NJ_YH_subRA_2R2C_0 N<0> N<1> SEL<0> P<1> SEL<1> VSUBS P<0>
XNJ_YH_cell_1t1r_lv_0_0 SEL<1> N<0> P<0> VSUBS NJ_YH_cell_1t1r_lv_0
XNJ_YH_cell_1t1r_lv_0_1 SEL<1> N<1> P<1> VSUBS NJ_YH_cell_1t1r_lv_0
XNJ_YH_cell_1t1r_lv_0_2 SEL<0> N<0> P<0> VSUBS NJ_YH_cell_1t1r_lv_0
XNJ_YH_cell_1t1r_lv_0_3 SEL<0> N<1> P<1> VSUBS NJ_YH_cell_1t1r_lv_0
.ends

.subckt NJ_YH_cell_1t1r_lv SEL N P VSUBS
X0 N SEL a_65_65# VSUBS sky130_fd_pr__nfet_01v8 ad=0.4 pd=2.68 as=0.125 ps=1.17 w=0.89 l=0.15 M=2
X1 P a_65_65# sky130_fd_pr__reram_reram_cell area_ox=0.0254
.ends

.subckt NJ_YH_subRA_2R2C N<0> N<1> SEL<1> SEL<0> P<1> VSUBS P<0>
XNJ_YH_cell_1t1r_lv_0_0 SEL<1> N<0> P<0> VSUBS NJ_YH_cell_1t1r_lv_0
XNJ_YH_cell_1t1r_lv_0_1 SEL<0> N<0> P<0> VSUBS NJ_YH_cell_1t1r_lv_0
XNJ_YH_cell_1t1r_lv_0 SEL<1> N<1> P<1> VSUBS NJ_YH_cell_1t1r_lv
XNJ_YH_cell_1t1r_lv_1 SEL<0> N<1> P<1> VSUBS NJ_YH_cell_1t1r_lv
.ends

However, in neighboring placements of

subRA_2R2C

in

subRA_2R16C

, the lower level met2 layer connectivity is broken.

.subckt NJ_YH_subRA_2R16C SEL<0> SEL<1> N<15> N<12> N<11> N<1> N<14> N<2> N<6> N<3>
+ N<4> N<5> N<13> N<10> N<7> N<8> N<9> P<12> P<11> P<2> P<10> P<3> P<4> P<8> P<5>
+ P<13> P<9> P<6> P<7> VSS P<1> NJ_YH_subRA_2R2C_1/SEL<1> NJ_YH_subRA_2R2C_1/SEL<0>
+ P<14> P<0> P<15> N<0>
XNJ_YH_subRA_2R2C_0_0[0] N<2> N<3> NJ_YH_subRA_2R2C_1/SEL<0> P<3> NJ_YH_subRA_2R2C_1/SEL<1>
+ VSS P<2> NJ_YH_subRA_2R2C_0
XNJ_YH_subRA_2R2C_0_0[1] N<4> N<5> NJ_YH_subRA_2R2C_0_0[1]/SEL<0> P<5> NJ_YH_subRA_2R2C_0_0[1]/SEL<1>
+ VSS P<4> NJ_YH_subRA_2R2C_0
XNJ_YH_subRA_2R2C_0_0[2] N<6> N<7> NJ_YH_subRA_2R2C_0_0[2]/SEL<0> P<7> NJ_YH_subRA_2R2C_0_0[2]/SEL<1>
+ VSS P<6> NJ_YH_subRA_2R2C_0
XNJ_YH_subRA_2R2C_0_0[3] N<8> N<9> NJ_YH_subRA_2R2C_0_0[3]/SEL<0> P<9> NJ_YH_subRA_2R2C_0_0[3]/SEL<1>
+ VSS P<8> NJ_YH_subRA_2R2C_0
XNJ_YH_subRA_2R2C_0_0[4] N<10> N<11> NJ_YH_subRA_2R2C_0_0[4]/SEL<0> P<11> NJ_YH_subRA_2R2C_0_0[4]/SEL<1>
+ VSS P<10> NJ_YH_subRA_2R2C_0
XNJ_YH_subRA_2R2C_0_0[5] N<12> N<13> SEL<0> P<13> SEL<1> VSS P<12> NJ_YH_subRA_2R2C_0
XNJ_YH_subRA_2R2C_1 N<1> N<0> NJ_YH_subRA_2R2C_1/SEL<1> NJ_YH_subRA_2R2C_1/SEL<0>
+ P<0> VSS P<1> NJ_YH_subRA_2R2C
XNJ_YH_subRA_2R2C_0 N<14> N<15> SEL<1> SEL<0> P<15> VSS P<14> NJ_YH_subRA_2R2C
.ends

The right 2 instances

XNJ_YH_subRA_2R2C_0_0[5]

and

XNJ_YH_subRA_2R2C_0 N<14>

are connected as expected, but the left 6 instances have unconnected hierarchical nets such as

NJ_YH_subRA_2R2C_1/SEL<0>

. Bottom level Middle level (*one level down) Top level Executing

./run_ext

in the attached tarball should recreate the problem. sel_connect.tgz RTimothyEdwards/magic