Added option to the poly resistor to use a high-voltage well for the
guard ring.
diff --git a/sky130/magic/sky130.tcl b/sky130/magic/sky130.tcl
index bfebee0..265e33a 100644
--- a/sky130/magic/sky130.tcl
+++ b/sky130/magic/sky130.tcl
@@ -2243,7 +2243,7 @@
rho 48.2 val 241 dummy 0 dw 0.0 term 0.0 \
sterm 0.0 caplen 0.4 snake 0 guard 1 \
glc 1 grc 1 gtc 1 gbc 1 roverlap 0 endcov 100 \
- full_metal 1 vias 1 \
+ full_metal 1 hv_guard 0 vias 1 \
viagb 0 viagt 0 viagl 0 viagr 0}
}
@@ -2609,6 +2609,9 @@
if {[dict exists $parameters guard]} {
magic::add_checkbox guard "Add guard ring" $parameters
+ if {[dict exists $parameters hv_guard]} {
+ magic::add_checkbox hv_guard "High-voltage guard ring" $parameters
+ }
if {[dict exists $parameters full_metal]} {
magic::add_checkbox full_metal "Full metal guard ring" $parameters
}
@@ -3209,13 +3212,26 @@
set $key [dict get $sky130::ruleset $key]
}
+ if {[dict exists $parameters hv_guard]} {
+ if {[dict get $parameters hv_guard] == 1} {
+ set gdifftype mvnsd
+ set gdiffcont mvnsc
+ set gsurround 0.33
+ } else {
+ set gdifftype nsd
+ set gdiffcont nsc
+ set gsurround $sub_surround
+ }
+ }
+
set newdict [dict create \
res_type npres \
end_type poly \
end_contact_type pc \
- plus_diff_type nsd \
- plus_contact_type nsc \
+ plus_diff_type $gdifftype \
+ plus_contact_type $gdiffcont \
sub_type nwell \
+ guard_sub_surround $gsurround \
end_surround $poly_surround \
end_spacing 0.48 \
end_to_end_space 0.52 \
@@ -3225,6 +3241,7 @@
mask_clearance 0.52 \
overlap_compress 0.36 \
]
+
set drawdict [dict merge $sky130::ruleset $newdict $parameters]
return [sky130::res_draw $drawdict]
}
