Add - comment on number derived for stripe and ring

Signed-off-by: louiic <[email protected]>

Author: louiic

flow/designs/asap7/mock-array-big/Element/pdn.tcl

@@ -11,8 +11,13 @@ set_voltage_domain -name {CORE} -power {VDD} -ground {VSS}
 
 ####################################
 # standard cell grid
+# M1 M2 are for follow pin, width derived from PG rail in standard cell
+# M5 stripe width rerived from one of width allowed in LEF, offset and pitch
+#   put stripe on M5 track
+# M4 M5 ring follow stripe width
 ####################################
 define_pdn_grid -name {top} -voltage_domains {CORE}
+
 add_pdn_ring    -grid {top} -layers {M5 M4} -widths {0.12 0.12} -spacings {0.072} -core_offset {0.084}
 
 add_pdn_stripe  -grid {top} -layer  {M1}    -width {0.018} -pitch {0.54} -offset {0} -followpins