Implemented the photodiode device in the parameterized device
generator for magic.
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index b5546bf..7c5e949 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -82,6 +82,7 @@
# sky130_fd_pr__res_iso_pw rpw pwell resistor (in deep nwell)
# sky130_fd_pr__esd_nfet_g5v0d10v5 mvnfetesd ESD thickox nFET
# sky130_fd_pr__esd_pfet_g5v0d10v5 mvpfetesd ESD thickox pFET
+# sky130_fd_pr__photodiode photo Photodiode
#
# (*) Note that ppres may extract into some generic type called
# "sky130_fd_pr__res_xhigh_po", but only specific sizes of xhrpoly are
@@ -142,6 +143,7 @@
# Deep nwell
dwell dnwell,dnw
dwell isosubstrate,isosub
+ dwell photodiode,photo
# Wells
well nwell,nw
@@ -474,6 +476,7 @@
nwell nwell
pwell pwell
rpwell pwell ptransistor_stripes
+ photo nwell nwell_field_implant
ndiff ndiffusion
fomfill ndiffusion
pdiff pdiffusion
@@ -693,7 +696,7 @@
#-----------------------------------------------------
connect
- *nwell,*nsd,*mvnsd,dnwell,pnp *nwell,*nsd,*mvnsd,dnwell,pnp
+ *nwell,*nsd,*mvnsd,dnwell,pnp,photo *nwell,*nsd,*mvnsd,dnwell,pnp,photo
pwell,*psd,*mvpsd,npn pwell,*psd,*mvpsd,npn
*li,coreli,lifill *li,coreli,lifill
*m1,m1fill,obsmcon *m1,m1fill,obsmcon
@@ -751,7 +754,7 @@
# DNWELL
#----------------------------------------------------------------
- layer DNWELL dnwell,npn
+ layer DNWELL dnwell,npn,photo
calma 64 18
layer PWRES rpw
@@ -974,6 +977,9 @@
mask-hints PNPID
calma 82 44
+ layer PHOTO photo
+ calma 81 81
+
#----------------------------------------------------------------
# RPM
#----------------------------------------------------------------
@@ -2387,6 +2393,9 @@
and-not NWELL,nwelcheck
and NPNID
+ layer photo DNWELL
+ and PHOTO
+
layer rpw PWRES
and DNWELL
labels PWRES
@@ -3927,6 +3936,8 @@
calma CAPID 82 64
# Core area ID mark
calma COREID 81 2
+ # Photodiode ID mark
+ calma PHOTO 81 81
# Standard cell ID mark
calma STDCELL 81 4
# Padframe cell ID mark
@@ -4104,6 +4115,11 @@
"P+ diff cannot straddle Deep N-well (dnwell.5)"
variants (fast),(full)
+ width photo 3000 "Photodiode width < %d (photo.2)"
+ spacing photo photo 5000 touching_ok "Photodiode spacing < %d (photo.3)"
+ spacing photo dnwell 5300 touching_illegal \
+ "Photodiode spacing to deep nwell < %d (photo.4)"
+
#-----------------------------
# NWELL
#-----------------------------
@@ -5394,6 +5410,8 @@
device resistor sky130_fd_pr__res_generic_m4 rm4 *m4
device resistor sky130_fd_pr__res_generic_m5 rm5 *m5
#endif (METAL5)
+ device ndiode sky130_fd_pr__model__parasitic__diode_ps2dn \
+ photo pwell,space/w error a=area
device rsubcircuit sky130_fd_pr__res_high_po_0p35 xhrpoly \
xpc pwell,space/w error +res0p35 l=l
