From 4f8ab78ee2e812784d5ce279ef129af1acf40d6b Mon Sep 17 00:00:00 2001
From: Matt Guthaus <mrg@ucsc.edu>
Date: Wed, 11 Apr 2018 09:29:54 -0700
Subject: [PATCH] Change write driver supply pins to M2

---
 compiler/modules/write_driver_array.py        |  23 +++++++++---------
 technology/freepdk45/gds_lib/write_driver.gds | Bin 24576 -> 22528 bytes
 .../scn3me_subm/gds_lib/write_driver.gds      | Bin 12132 -> 11876 bytes
 .../scn3me_subm/mag_lib/write_driver.mag      |  17 ++++---------
 4 files changed, 16 insertions(+), 24 deletions(-)

diff --git a/compiler/modules/write_driver_array.py b/compiler/modules/write_driver_array.py
index a220e473..a561b775 100644
--- a/compiler/modules/write_driver_array.py
+++ b/compiler/modules/write_driver_array.py
@@ -82,7 +82,17 @@ class write_driver_array(design.design):
                                 offset=br_pin.ll(),
                                 width=br_pin.width(),
                                 height=br_pin.height())
-                           
+
+            for n in ["vdd", "gnd"]:
+                pin_pos = self.driver_insts[i].get_pin(n).center()
+                # Add the M2->M3 stack 
+                self.add_via_center(layers=("metal2", "via2", "metal3"),
+                                    offset=pin_pos)
+                self.add_layout_pin_rect_center(text=n,
+                                                layer="metal3",
+                                                offset=pin_pos)
+
+
 
         self.add_layout_pin(text="en",
                             layer="metal1",
@@ -90,16 +100,5 @@ class write_driver_array(design.design):
                             width=self.width,
                             height=drc['minwidth_metal1'])
                        
-        self.add_layout_pin(text="vdd",
-                            layer="metal1",
-                            offset=self.driver_insts[0].get_pin("vdd").ll().scale(0,1),
-                            width=self.width,
-                            height=drc['minwidth_metal1'])
-                       
-        self.add_layout_pin(text="gnd",
-                            layer="metal1",
-                            offset=self.driver_insts[0].get_pin("gnd").ll().scale(0,1),
-                            width=self.width,
-                            height=drc['minwidth_metal1'])
                        
 
diff --git a/technology/freepdk45/gds_lib/write_driver.gds b/technology/freepdk45/gds_lib/write_driver.gds
index 4954fc800572cf2e762aeff8e3af7144a709ca3a..7c5e94caba4a17b3d019e9c54491f779f520abae 100644
GIT binary patch
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diff --git a/technology/scn3me_subm/gds_lib/write_driver.gds b/technology/scn3me_subm/gds_lib/write_driver.gds
index a8a9c176943ac71d6f817b59c2025814ec4005bd..495a484f54c5279b71ea55636dbdeffe46d7b373 100644
GIT binary patch
delta 217
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diff --git a/technology/scn3me_subm/mag_lib/write_driver.mag b/technology/scn3me_subm/mag_lib/write_driver.mag
index 7398bb84..2a90ff9a 100644
--- a/technology/scn3me_subm/mag_lib/write_driver.mag
+++ b/technology/scn3me_subm/mag_lib/write_driver.mag
@@ -1,6 +1,6 @@
 magic
 tech scmos
-timestamp 1517448475
+timestamp 1523061656
 << nwell >>
 rect -3 101 37 138
 rect -3 0 37 51
@@ -174,8 +174,7 @@ rect 30 142 33 181
 rect 20 138 33 142
 rect 20 132 24 138
 rect 12 122 16 125
-rect 0 118 8 122
-rect 16 118 36 122
+rect 16 118 17 122
 rect 13 114 17 118
 rect 5 104 9 107
 rect 21 104 25 107
@@ -192,12 +191,10 @@ rect 11 45 15 48
 rect 27 45 31 60
 rect 3 35 7 38
 rect 19 35 23 38
-rect 0 31 3 35
 rect 7 31 8 35
-rect 12 31 36 35
+rect 12 31 23 35
 rect 0 24 7 28
 rect 11 24 36 28
-rect 0 17 32 21
 << m2contact >>
 rect 5 191 9 195
 rect 20 189 24 193
@@ -206,31 +203,27 @@ rect 8 118 12 122
 rect 30 82 34 86
 rect 19 64 23 68
 rect 8 31 12 35
-rect 32 17 36 21
 rect 12 10 16 14
 << metal2 >>
 rect 10 195 14 202
 rect 9 191 14 195
 rect 20 193 24 202
 rect 20 177 24 189
-rect 32 161 36 196
 rect 15 157 36 161
 rect 8 35 12 118
 rect 32 86 36 157
 rect 34 82 36 86
 rect 32 72 36 82
 rect 19 68 36 72
-rect 32 21 36 68
 rect 16 10 20 14
 rect 15 0 19 10
-rect 32 0 36 17
 << m3p >>
 rect 0 0 34 202
 << labels >>
-rlabel metal1 0 31 0 31 1 vdd
-rlabel metal1 0 17 0 17 7 gnd
 rlabel metal2 15 1 15 1 1 din
 rlabel metal1 2 25 2 25 3 en
 rlabel metal2 12 200 12 200 5 bl
 rlabel metal2 22 200 22 200 5 br
+rlabel metal2 10 94 10 94 1 vdd
+rlabel metal2 35 141 35 141 7 gnd
 << end >>