open-source-silicon.dev

<https://github.com/RTimothyEdwards/open_pdks/pull/243|#243 Spice fix for chip_io LVS>
Pull request opened by <https://github.com/d-m-bailey|d-m-bailey>
Also requires changes to the layout data.

• Added diodes to `sky130_fd_io__gnd2gnd_120x2_lv_isosub`
• Added default L/W to `sky130_fd_pr__res_generic_m1` in the following cells

```
 sky130_fd_io__gpio_ovtv2_pdpredrvr_strong_leak_fix
 sky130_fd_io__gpiov2_ctl_hld

```

• Removed `sky130_fd_pr__res_generic_m1` from `sky130_fd_io__signal_5_sym_hv_local_5term`  
    Also need to remove from layout. These are small donut shapes.
• Corrected L/W on `sky130_fd_pr__res_generic_m5` in the following cells

```
 sky130_fd_io__top_ground_hvc_wpad
 sky130_fd_io__top_power_hvc_wpadv2
 sky130_fd_io__top_ground_lvc_wpad
 sky130_fd_io__top_power_lvc_wpad

```

• Added `sky130_fd_pr__res_generic_m5` resistors to separate VSSIO/VSSIO_Q. Also requires addition to layout.

```
 sky130_ef_io__vssio_hvc_pad
 sky130_ef_io__vssio_hvc_clamped_pad

```

• Added `sky130_fd_pr__res_generic_m5` resistors to separate VDDIO/VDDIO_Q. Also requires addition to layout.

```
 sky130_ef_io__vddio_hvc_pad
 sky130_ef_io__vddio_hvc_clamped_pad

```

• Made the following changes to diode connections. For reference

```
.SUBCKT sky130_fd_io__top_power_lvc_wpad AMUXBUS_A AMUXBUS_B BDY2_B2B DRN_LVC1
+ DRN_LVC2 OGC_LVC P_CORE P_PAD SRC_BDY_LVC1 SRC_BDY_LVC2 VCCD VCCHIB VDDA VDDIO
+ VDDIO_Q VSSA VSSD VSSIO VSSIO_Q VSWITCH
Xesd_q0 BDY2_B2B SRC_BDY_LVC1 VSSD sky130_fd_io__gnd2gnd_120x2_lv_isosub
...

.SUBCKT sky130_fd_io__top_ground_lvc_wpad AMUXBUS_A AMUXBUS_B BDY2_B2B DRN_LVC1
+ DRN_LVC2 G_CORE G_PAD OGC_LVC SRC_BDY_LVC1 SRC_BDY_LVC2 VCCD VCCHIB VDDA VDDIO
+ VDDIO_Q VSSA VSSD VSSIO VSSIO_Q VSWITCH
Xesd_q0 BDY2_B2B SRC_BDY_LVC1 VSSD sky130_fd_io__gnd2gnd_120x2_lv_isosub
...

.SUBCKT sky130_fd_io__gnd2gnd_120x2_lv_isosub BDY2_B2B SRC_BDY_LVC1 VSSD
D0 SRC_BDY_LVC1 BDY2_B2B sky130_fd_pr__diode_pd2nw_05v5 area=90 pj=33
D1 BDY2_B2B SRC_BDY_LVC1 sky130_fd_pr__diode_pd2nw_05v5 area=90 pj=33
.ENDS

```

In `sky130_ef_io__vccd_lvc_clamped3_pad` the connections of `Xsky130_fd_io__top_power_lvc_base_q0` are changed as following

```
  BDY2_B2B changed from VSSD1 to VSSIO
  SRC_BDY_LVC1 changed from VSSIO to VSSD1

```

In `sky130_ef_io__vssd_lvc_clamped3_pad` the connections of `Xsky130_fd_io__top_ground_lvc_base_q0` are changed as following

```
  SRC_BDY_LVC1 changed from VSSIO to VSSD1
  SRC_BDY_LVC2 changed from VSSD to VSSD1

```

In `sky130_ef_io__vccd_lvc_clamped_pad` the connections of `Xsky130_fd_io__top_power_lvc_base_q0` are changed as following

```
  BDY2_B2B changed from VSSIO to VSSA
  SRC_BDY_LVC1 changed from VSSD to VSSIO

```

In `sky130_ef_io__vssd_lvc_clamped_pad` the connections of `Xsky130_fd_io__top_ground_lvc_base_q0` are changed as following

```
  BDY2_B2B changed from VSSIO to VSSA
  SRC_BDY_LVC1 changed from VSSD to VSSIO

```

Note: These changes do not fix all the size errors, but should fix the connectivity.

Warning: These changes have not been tested as part of `open_pdks`. Changes were made to the pdk directly to pass LVS. Those changes have manually made to the files here.
<https://github.com/RTimothyEdwards/open_pdks|RTimothyEdwards/open_pdks>
GitHub Actions: Run (all)
GitHub Actions: Run (sky130_fd_sc_hvl)
GitHub Actions: Run (sky130_fd_sc_ls)
GitHub Actions: Run (sky130_fd_sc_ms)
GitHub Actions: Run (sky130_fd_sc_hs)
GitHub Actions: Run (sky130_fd_sc_hdll)
GitHub Actions: Run (sky130_fd_sc_hd)
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