Corrected the sheet rho value for the isolated pwell resistor.
This value is based on the value in the magic tech file but still
does not match the device model (3050 ohms/sq at nominal vs.
3816 (see parameter rspwres)). Probably this has to do with
the narrow device width vs. the resistivity of isolated pwell
in general?
diff --git a/VERSION b/VERSION
index df8b1a9..da93f74 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.423
+1.0.424
diff --git a/sky130/magic/sky130.tcl b/sky130/magic/sky130.tcl
index a9991d8..70364ca 100644
--- a/sky130/magic/sky130.tcl
+++ b/sky130/magic/sky130.tcl
@@ -2498,14 +2498,15 @@
#----------------------------------------------------------------
#----------------------------------------------------------------
-# sky130_fd_pr__res_iso_pw: Specify all user-editable default values and those
-# needed by sky130_fd_pr__res_iso_pw_check
-# NOTE: Work in progress. These values need to be corrected.
+# sky130_fd_pr__res_iso_pw: Specify all user-editable default values
+# and those needed by sky130_fd_pr__res_iso_pw_check
+# NOTE: Work in progress. Some values need to be corrected.
+# Discrepancy between sheet rho value in documentation vs. model.
#----------------------------------------------------------------
proc sky130::sky130_fd_pr__res_iso_pw_defaults {} {
return {w 2.650 l 26.50 m 1 nx 1 wmin 2.650 lmin 26.50 \
- rho 975 val 4875 dummy 0 dw 0.25 term 1.0 \
+ rho 3050 val 30502 dummy 0 dw 0.25 term 1.0 \
guard 1 endcov 100 full_metal 1 vias 1 \
viagb 0 viagt 0 viagl 0 viagr 0}
}
