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Moved pwr/gnd vias and corrected width boundary.

This commit is contained in:
jsowash 2019-08-20 09:14:23 -07:00
parent 316132a33c
commit 71af70a636
1 changed files with 24 additions and 18 deletions
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42
compiler/modules/write_mask_and_array.py
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@ -44,12 +44,10 @@ class write_mask_and_array(design.design):
def create_layout(self): def create_layout(self):
self.width = self.num_wmasks * self.and2.width
self.height = self.and2.height
self.place_and2_array() self.place_and2_array()
spacing = self.wmask_en_len - self.and2.width
self.width = (self.num_wmasks*self.and2.width) + ((self.num_wmasks-1)*spacing)
self.height = self.and2.height
self.add_layout_pins() self.add_layout_pins()
self.add_boundary() self.add_boundary()
self.DRC_LVS() self.DRC_LVS()
@ -102,6 +100,7 @@ class write_mask_and_array(design.design):
wmask_en_len = self.words_per_row * (self.write_size * self.driver_spacing) wmask_en_len = self.words_per_row * (self.write_size * self.driver_spacing)
if wmask_en_len < self.and2.width: if wmask_en_len < self.and2.width:
debug.error("Cannot layout write mask AND array. One pand2 is longer than the corresponding write drivers.") debug.error("Cannot layout write mask AND array. One pand2 is longer than the corresponding write drivers.")
self.wmask_en_len = wmask_en_len
for i in range(self.num_wmasks): for i in range(self.num_wmasks):
base = vector(i * wmask_en_len, 0) base = vector(i * wmask_en_len, 0)
@ -109,6 +108,8 @@ class write_mask_and_array(design.design):
def add_layout_pins(self): def add_layout_pins(self):
self.nand2 = factory.create(module_type="pnand2")
supply_pin=self.nand2.get_pin("vdd")
for i in range(self.num_wmasks): for i in range(self.num_wmasks):
wmask_in_pin = self.and2_insts[i].get_pin("A") wmask_in_pin = self.and2_insts[i].get_pin("A")
self.add_layout_pin(text="wmask_in_{0}".format(i), self.add_layout_pin(text="wmask_in_{0}".format(i),
@ -118,8 +119,10 @@ class write_mask_and_array(design.design):
height=wmask_in_pin.height()) height=wmask_in_pin.height())
en_pin = self.and2_insts[i].get_pin("B") en_pin = self.and2_insts[i].get_pin("B")
# Add the M1->M2 stack
self.add_via_center(layers=("metal1", "via1", "metal2"), self.add_via_center(layers=("metal1", "via1", "metal2"),
offset=en_pin.center()) offset=en_pin.center())
# Add the M2->M3 stack
self.add_via_center(layers=("metal2", "via2", "metal3"), self.add_via_center(layers=("metal2", "via2", "metal3"),
offset=en_pin.center()) offset=en_pin.center())
@ -137,19 +140,22 @@ class write_mask_and_array(design.design):
width=wmask_out_pin.width(), width=wmask_out_pin.width(),
height=wmask_out_pin.height()) height=wmask_out_pin.height())
for n in ["vdd", "gnd"]:
pin_list = self.and2_insts[i].get_pins(n) self.add_via_center(layers=("metal1", "via1", "metal2"),
for pin in pin_list: offset=vector(supply_pin.width()+i*self.wmask_en_len,0))
pin_pos = pin.center() self.add_via_center(layers=("metal2", "via2", "metal3"),
# Add the M1->M2 stack offset=vector(supply_pin.width()+i*self.wmask_en_len,0))
self.add_via_center(layers=("metal1", "via1", "metal2"), self.add_layout_pin_rect_center(text="gnd",
offset=pin_pos) layer="metal3",
# Add the M2->M3 stack offset=vector(supply_pin.width()+i*self.wmask_en_len,0))
self.add_via_center(layers=("metal2", "via2", "metal3"),
offset=pin_pos) self.add_via_center(layers=("metal1", "via1", "metal2"),
self.add_layout_pin_rect_center(text=n, offset=vector(supply_pin.width()+i*self.wmask_en_len, self.height))
layer="metal3", self.add_via_center(layers=("metal2", "via2", "metal3"),
offset=pin_pos) offset=vector(supply_pin.width()+i*self.wmask_en_len, self.height))
self.add_layout_pin_rect_center(text="vdd",
layer="metal3",
offset=vector(supply_pin.width()+i*self.wmask_en_len, self.height))
def en_width(self, pin): def en_width(self, pin):
en_pin = self.and2_insts[pin].get_pin("B") en_pin = self.and2_insts[pin].get_pin("B")