docs: Adding periphery rules.
Updates and documentation originally improved and then release by
Kevin Kelly <kevin.kelley@skywatertechnology.com> to Google for imported
into the docutils RST format by Tim 'mithro' Ansell <tansell@google.com>.
Signed-off-by: Kevin Kelley <kevin.kelley@skywatertechnology.com>
Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>
diff --git a/docs/rules/periphery/p026-difftap_dotdash.csv b/docs/rules/periphery/p026-difftap_dotdash.csv
new file mode 100644
index 0000000..d60873a
--- /dev/null
+++ b/docs/rules/periphery/p026-difftap_dotdash.csv
@@ -0,0 +1,15 @@
+Name,Description,Flags,Value
+(difftap.1),Width of diff or tap,P,0.150
+(difftap.2),"Minimum channel width (Diff And Poly) except for FETs inside :drc_tag:`areaid.sc`: Rule exempted in the SP8* flows only, for the cells listed in rule difftap.2a",P,0.420
+(difftap.2a),"Minimum channel width (Diff And Poly) for cell names ""s8cell_ee_plus_sseln_a"", ""s8cell_ee_plus_sseln_b"", ""s8cell_ee_plus_sselp_a"", ""s8cell_ee_plus_sselp_b"" , ""s8fpls_pl8"", ""s8fpls_rdrv4"" , ""s8fpls_rdrv4f"" and ""s8fpls_rdrv8""",P,NA
+(difftap.2b),Minimum channel width (Diff And Poly) for FETs inside :drc_tag:`areaid.sc`,P,0.360
+(difftap.3),"Spacing of diff to diff, tap to tap, or non-abutting diff to tap",,0.270
+(difftap.4),Min tap bound by one diffusion,,0.290
+(difftap.5),Min tap bound by two diffusions,P,0.400
+(difftap.6),Diff and tap are not allowed to extend beyond their abutting edge,,
+(difftap.7),Spacing of diff/tap abutting edge to a non-conciding diff or tap edge,NE,0.130
+(difftap.8),Enclosure of (p+) diffusion by N-well. Rule exempted inside UHVI.,DE NE P,0.180
+(difftap.9),Spacing of (n+) diffusion to N-well outside UHVI,DE NE P,0.340
+(difftap.10),Enclosure of (n+) tap by N-well. Rule exempted inside UHVI.,NE P,0.180
+(difftap.11),Spacing of (p+) tap to N-well. Rule exempted inside UHVI.,,0.130
+(difftap.12),ESD_nwell_tap is considered shorted to the abutting diff,NC,
