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base and dummy array alignment in sky130

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This commit is contained in:
Jacob Walker
2023-03-30 11:30:50 -07:00
parent d7ac26a053
commit 7309af7e29
4 changed files with 273 additions and 32 deletions
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compiler/modules/rom_base_array.py
+66 -31
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@@ -40,7 +40,7 @@ class rom_base_array(bitcell_base_array):
self.place_ptx()
#self.route_horizontal_pins(insts=self.cell_inst.values(), layer=self.route_layer, name="S")
self.route_bitlines()
#self.route_bitlines()
#self.route_wordlines()
self.route_supplies()
@@ -51,17 +51,26 @@ class rom_base_array(bitcell_base_array):
#def add_pins(self):
def add_boundary(self):
self.width = self.nmos.width * self.column_size
self.height = self.nmos.height * self.row_size
self.width = self.cell.width * self.column_size
self.height = self.cell.height * self.row_size
super().add_boundary()
def add_modules(self):
self.nmos = factory.create(module_type="ptx", tx_type="nmos", add_source_contact=self.route_layer,
add_drain_contact=self.route_layer)
temp = self.nmos.width
self.nmos.width = self.nmos.height + self.nmos.poly_extend_active
self.nmos.height = temp
# base cell, nmos tx that represents a 1
self.cell = factory.create(module_type="rom_base_cell")
# "dummy" cells represent 0
#dummy cell with no contacts
self.dummy_nc = factory.create(module_type="rom_dummy_cell")
#dummy cell with drain contact
self.dummy_dc = factory.create(module_type="rom_dummy_cell", drain_contact=True)
#dummy cell with source contact
self.dummy_sc = factory.create(module_type="rom_dummy_cell", source_contact=True)
#dummy cell with all contacts
self.dummy_ac = factory.create(module_type="rom_dummy_cell", source_contact=True, drain_contact=True)
def create_instances(self):
self.cell_inst = {}
self.cell_list = []
@@ -75,11 +84,31 @@ class rom_base_array(bitcell_base_array):
if(self.data[row][col] == 1):
self.cell_inst[row, col]=self.add_inst(name=name,
mod=self.nmos, rotate=90)
mod=self.cell)
row_list.append(self.cell_inst[row, col])
self.connect_inst(self.get_bitcell_pins(row, col))
else: row_list.append(None)
self.connect_inst(["vdd", "gnd", "gnd"])
else:
if col < self.column_size - 1 and col > 0 and self.data[row][col + 1] == 1 and self.data[row][col - 1] == 1:
self.cell_inst[row, col]=self.add_inst(name=name, mod=self.dummy_ac)
elif col > 0 and self.data[row][col - 1] == 1:
self.cell_inst[row, col]=self.add_inst(name=name, mod=self.dummy_dc)
elif col < self.column_size - 1 and self.data[row][col + 1] == 1:
self.cell_inst[row, col]=self.add_inst(name=name, mod=self.dummy_sc)
else:
self.cell_inst[row, col]=self.add_inst(name=name, mod=self.dummy_nc)
self.connect_inst([])
row_list.append(self.cell_inst[row, col])
self.cell_list.append(row_list)
@@ -94,34 +123,40 @@ class rom_base_array(bitcell_base_array):
def place_ptx(self):
self.cell_pos = {}
for col in range(self.column_size):
for row in range(self.row_size):
# rows are bitlines
for row in range(self.row_size):
# columns are word lines
for col in range(self.column_size):
#cell_x = (self.nmos.height + self.nmos.poly_extend_active) * col
#cell_y = (self.nmos.width + 2 * self.nmos.active_contact_to_gate + self.nmos.contact_width) * row
cell_x = self.nmos.width * col
cell_y = self.nmos.height * row
print(self.nmos.height + self.nmos.poly_extend_active)
cell_x = (self.cell.width) * col
cell_y = row * (self.cell.height)
self.cell_pos[row, col] = vector(cell_x, cell_y)
self.cell_inst[row, col].place(self.cell_pos[row, col])
#cell_x = self.cell.width * col
#cell_y = self.cell.height * row
#print(self.nmos.height + self.nmos.poly_extend_active)
if(self.data[row][col] == 1):
pass
self.cell_pos[row, col] = self.nmos.active_offset.scale(1, 0) \
+ vector(cell_x, cell_y)
self.cell_inst[row, col].place(self.cell_pos[row, col], rotate=90)
self.add_label("S_{}_{}".format(row,col), self.route_layer, self.cell_inst[row, col].get_pin("S").center())
self.add_label("D", self.route_layer, self.cell_inst[row, col].get_pin("D").center())
#self.add_label("S_{}_{}".format(row,col), self.route_layer, self.cell_inst[row, col].center())
#self.add_label("D", self.route_layer, self.cell_inst[row, col].center())
else:
#else:
#poly_offset = (self.nmos.contact_offset + vector(0.5 * self.nmos.active_contact.width + 0.5 * self.nmos.poly_width + self.nmos.active_contact_to_gate, 0)) + (0, cell_y)
poly_offset = (cell_x, cell_y)
#poly_offset = (cell_x, cell_y)
#print(cell_x,cell_y)
self.add_rect(layer="poly",
offset=poly_offset,
width=self.nmos.height + self.nmos.poly_extend_active,
height=self.nmos.poly_width
)
#self.add_rect(layer="poly",
# offset=poly_offset,
# width=self.nmos.height + self.nmos.poly_extend_active,
# height=self.nmos.poly_width
# )