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rom base passing tests with top level routing

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This commit is contained in:
Jacob Walker
2023-03-30 11:30:50 -07:00
parent 7c453e80be
commit fef9902c45
11 changed files with 176 additions and 83 deletions
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compiler/modules/rom_wordline_driver_array.py
+46 -14
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@@ -49,11 +49,13 @@ class rom_wordline_driver_array(design):
self.route_layer = "m1"
self.place_drivers()
self.route_layout()
self.route_supplies()
if self.tap_spacing != 0:
self.place_taps()
self.route_supplies()
self.add_boundary()
def add_pins(self):
# inputs to wordline_driver.
for i in range(self.rows):
@@ -66,7 +68,7 @@ class rom_wordline_driver_array(design):
def add_modules(self):
b = factory.create(module_type="rom_base_cell")
self.tap = factory.create(module_type="rom_poly_tap", add_tap = True)
self.tap = factory.create(module_type="rom_poly_tap", add_active_tap = True)
if self.invert_outputs:
self.wl_driver = factory.create(module_type="pinv_dec",
@@ -86,13 +88,41 @@ class rom_wordline_driver_array(design):
Add a pin for each row of vdd/gnd which
are must-connects next level up.
"""
if layer_props.wordline_driver.vertical_supply:
self.route_vertical_pins("vdd", [self], layer=self.supply_layer)
self.route_vertical_pins("gnd", [self], layer=self.supply_layer)
# self.route_vertical_pins("vdd", self.wld_inst, xside="cx", layer=self.supply_layer)
# self.route_vertical_pins("gnd", self.wld_inst, xside="cx", layer=self.supply_layer)
if not self.invert_outputs:
vdd_pins = [pin for inst in self.wld_inst for pin in inst.get_pins("vdd")]
gnd_pins = [pin for inst in self.wld_inst for pin in inst.get_pins("gnd")]
else:
self.route_vertical_pins("vdd", self.wld_inst, xside="rx",)
self.route_vertical_pins("gnd", self.wld_inst, xside="lx",)
vdd_pins = [inst.get_pin("vdd") for inst in self.wld_inst]
gnd_pins = [inst.get_pin("gnd") for inst in self.wld_inst]
if self.tap_spacing != 0:
vdd_pins = vdd_pins + self.vdd_taps
gnd_pins = gnd_pins + self.gnd_taps
supply_width = drc["minwidth_{}".format(self.supply_layer)]
# Route together all internal supply pins
self.connect_col_pins(layer=self.supply_layer, pins=vdd_pins, name="vdd_tmp")
self.connect_col_pins(layer=self.supply_layer, pins=gnd_pins, name="gnd_tmp")
self.remove_layout_pin("gnd_tap")
self.remove_layout_pin("vdd_tap")
# Place the top level supply pins on the edge of the module
for pin in self.get_pins("gnd_tmp"):
bottom = vector(pin.cx(), pin.by() - 0.5 * supply_width)
top = vector(pin.cx(), pin.uy() + 0.5 * supply_width)
self.add_layout_pin_rect_ends(layer=self.supply_layer, start=bottom, end=top, name="gnd")
for pin in self.get_pins("vdd_tmp"):
bottom = vector(pin.cx(), pin.by() - 0.5 * supply_width)
top = vector(pin.cx(), pin.uy() + 0.5 * supply_width)
self.add_layout_pin_rect_ends(layer=self.supply_layer, start=bottom, end=top, name="vdd")
self.remove_layout_pin("gnd_tmp")
self.remove_layout_pin("vdd_tmp")
def create_drivers(self):
self.wld_inst = []
@@ -125,8 +155,7 @@ class rom_wordline_driver_array(design):
else:
row_num = row
inst = self.wld_inst[row_num]
self.copy_layout_pin(inst, "vdd")
self.copy_layout_pin(inst, "gnd")
self.copy_layout_pin(inst, "A", "in_{0}".format(row))
@@ -151,7 +180,8 @@ class rom_wordline_driver_array(design):
self.add_layout_pin_rect_center(text="out_{}".format(row), layer=self.route_layer, offset=end - vector(0, 0.5 * route_width))
def place_taps(self):
self.vdd_taps = []
self.gnd_taps = []
for wl in range(0 , self.rows, self.tap_spacing):
driver = self.wld_inst[wl]
@@ -176,6 +206,7 @@ class rom_wordline_driver_array(design):
self.place_tap(contact_pos, "p")
def place_tap(self, offset, well_type):
self.add_via_center(layers=self.active_stack,
offset=offset,
implant_type=well_type,
@@ -185,7 +216,8 @@ class rom_wordline_driver_array(design):
from_layer=self.active_stack[2],
to_layer=self.supply_layer)
if well_type == "p":
pin = "gnd"
pin = "gnd_tap"
self.gnd_taps.append(self.add_layout_pin_rect_center(text=pin, layer=self.supply_layer, offset=offset))
else:
pin = "vdd"
self.add_layout_pin_rect_center(text=pin, layer=self.supply_layer, offset=offset)
pin = "vdd_tap"
self.vdd_taps.append(self.add_layout_pin_rect_center(text=pin, layer=self.supply_layer, offset=offset))