luke
/
OpenRAM
mirror of https://github.com/VLSIDA/OpenRAM.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Changed A/Z pins to copy_layout_pin and made en (B) pin a single pin.

This commit is contained in:
jsowash 2019-08-29 09:01:35 -07:00
parent bdf29c3a26
commit 5099ff6f6c
1 changed files with 11 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
compiler/modules/write_mask_and_array.py
View File

@ -105,13 +105,17 @@ class write_mask_and_array(design.design):
def add_layout_pins(self): def add_layout_pins(self):
self.nand2 = factory.create(module_type="pnand2") self.nand2 = factory.create(module_type="pnand2")
supply_pin=self.nand2.get_pin("vdd") supply_pin=self.nand2.get_pin("vdd")
beg_en_pin = self.and2_insts[0].get_pin("B")
end_en_pin = self.and2_insts[self.num_wmasks-1].get_pin("B")
self.add_layout_pin(text="en",
layer="metal3",
offset=beg_en_pin.ll(),
width = end_en_pin.rx() - beg_en_pin.lx())
for i in range(self.num_wmasks): for i in range(self.num_wmasks):
self.copy_layout_pin(self.and2_insts[i],"A","wmask_in_{0}".format(i))
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),
layer=wmask_in_pin.layer,
offset=wmask_in_pin.ll(),
width=wmask_in_pin.width(),
height=wmask_in_pin.height())
self.add_via_center(layers=("metal1", "via1", "metal2"), self.add_via_center(layers=("metal1", "via1", "metal2"),
offset=wmask_in_pin.center()) offset=wmask_in_pin.center())
@ -123,39 +127,18 @@ class write_mask_and_array(design.design):
self.add_via_center(layers=("metal2", "via2", "metal3"), self.add_via_center(layers=("metal2", "via2", "metal3"),
offset=en_pin.center()) offset=en_pin.center())
# Route en pin between AND gates
if i < self.num_wmasks-1:
self.add_layout_pin(text="en",
layer="metal3",
offset=en_pin.bc(),
width = self.en_width(i),
height = drc('minwidth_metal3'))
wmask_out_pin = self.and2_insts[i].get_pin("Z") self.copy_layout_pin(self.and2_insts[i],"Z","wmask_out_{0}".format(i))
self.add_layout_pin(text="wmask_out_{0}".format(i),
layer=wmask_out_pin.layer,
offset=wmask_out_pin.ll(),
width=wmask_out_pin.width(),
height=wmask_out_pin.height())
self.add_power_pin("gnd", vector(supply_pin.width() + i * self.wmask_en_len, 0)) self.add_power_pin("gnd", vector(supply_pin.width() + i * self.wmask_en_len, 0))
self.add_power_pin("vdd", vector(supply_pin.width() + i * self.wmask_en_len, self.height)) self.add_power_pin("vdd", vector(supply_pin.width() + i * self.wmask_en_len, self.height))
# Route power and ground rails together
if i < self.num_wmasks-1: if i < self.num_wmasks-1:
for n in ["gnd","vdd"]: for n in ["gnd","vdd"]:
pin = self.and2_insts[i].get_pin(n) pin = self.and2_insts[i].get_pin(n)
next_pin = self.and2_insts[i+1].get_pin(n) next_pin = self.and2_insts[i+1].get_pin(n)
self.add_path("metal1",[pin.center(),next_pin.center()]) self.add_path("metal1",[pin.center(),next_pin.center()])
def en_width(self, pin):
en_pin = self.and2_insts[pin].get_pin("B")
next_en_pin = self.and2_insts[pin+1].get_pin("B")
width = next_en_pin.center() - en_pin.center()
# Return x coordinates only
return width[0]
def get_cin(self): def get_cin(self):
"""Get the relative capacitance of all the input connections in the bank""" """Get the relative capacitance of all the input connections in the bank"""
# The enable is connected to an and2 for every row. # The enable is connected to an and2 for every row.