luke/OpenRAM
1
0
Fork 0
mirror of https://github.com/VLSIDA/OpenRAM.git synced 2026-09-01 10:39:35 +02:00
Code Issues Packages Projects Releases Wiki Activity

New power strapping mostly working.

Browse Source 
Each module uses M3/M4 power straps with pins on the ends.
Works in all technologies for a single no mux, dual port SRAM.
This commit is contained in:
mrg
2022-04-05 13:51:55 -07:00
parent 68d0a56423
commit 5e546ee974
17 changed files with 512 additions and 286 deletions
Download Patch File Download Diff File Expand all files Collapse all files
compiler/modules/wordline_driver_array.py
+7 -45
View File
@@ -53,7 +53,7 @@ class wordline_driver_array(design.design):
self.height = self.wld_inst[-1].uy()
self.add_boundary()
self.route_vdd_gnd()
self.route_supplies()
self.DRC_LVS()
def add_pins(self):
@@ -72,54 +72,16 @@ class wordline_driver_array(design.design):
self.wl_driver = factory.create(module_type="wordline_driver",
cols=self.cols)
def route_vdd_gnd(self):
def route_supplies(self):
"""
Add vertical power rails.
"""
# Experiment with power straps
if OPTS.tech_name=="sky130" or OPTS.experimental_power:
if layer_props.wordline_driver.vertical_supply:
self.route_vertical_pins("vdd", insts=self.wld_inst)
self.route_vertical_pins("gnd", insts=self.wld_inst)
else:
self.route_vertical_pins("vdd", insts=self.wld_inst, xside="lx")
self.route_vertical_pins("gnd", insts=self.wld_inst, xside="rx")
# Widen the rails to cover any gap
for num in range(self.rows):
for name in ["vdd", "gnd"]:
supply_pin = self.wld_inst[num].get_pin(name)
self.add_segment_center(layer=supply_pin.layer,
start=vector(0, supply_pin.cy()),
end=vector(self.width, supply_pin.cy()))
else:
if layer_props.wordline_driver.vertical_supply:
for name in ["vdd", "gnd"]:
supply_pins = self.wld_inst[0].get_pins(name)
for pin in supply_pins:
self.add_layout_pin_segment_center(text=name,
layer=pin.layer,
start=pin.bc(),
end=vector(pin.cx(), self.height))
else:
# Find the x offsets for where the vias/pins should be placed
xoffset_list = [self.wld_inst[0].rx()]
for num in range(self.rows):
# this will result in duplicate polygons for rails, but who cares
# use the inverter offset even though it will be the and's too
(gate_offset, y_dir) = self.get_gate_offset(0,
self.wl_driver.height,
num)
# Route both supplies
for name in ["vdd", "gnd"]:
supply_pin = self.wld_inst[num].get_pin(name)
# Add pins in two locations
for xoffset in xoffset_list:
pin_pos = vector(xoffset, supply_pin.cy())
self.copy_power_pin(supply_pin, loc=pin_pos)
for inst in self.wld_inst:
for pin in inst.get_pins("vdd"):
self.add_power_pin("vdd", pin.rc())
#self.copy_layout_pin(inst, "vdd")
self.copy_layout_pin(inst, "gnd")
def create_drivers(self):