diff --git a/compiler/modules/wordline_driver.py b/compiler/modules/wordline_driver.py index ed379bcc..1b56a29a 100644 --- a/compiler/modules/wordline_driver.py +++ b/compiler/modules/wordline_driver.py @@ -44,7 +44,7 @@ class wordline_driver(design.design): # Outputs from wordline_driver. for i in range(self.rows): self.add_pin("wl_{0}".format(i)) - self.add_pin("en") + self.add_pin("en_bar") self.add_pin("vdd") self.add_pin("gnd") @@ -67,7 +67,7 @@ class wordline_driver(design.design): """ Add a pin for each row of vdd/gnd which are must-connects next level up. """ # Find the x offsets for where the vias/pins should be placed - a_xoffset = self.inv1_inst[0].rx() + a_xoffset = self.nand_inst[0].rx() b_xoffset = self.inv2_inst[0].lx() for num in range(self.rows): # this will result in duplicate polygons for rails, but who cares @@ -95,24 +95,16 @@ class wordline_driver(design.design): def create_drivers(self): - self.inv1_inst = [] self.nand_inst = [] self.inv2_inst = [] for row in range(self.rows): - name_inv1 = "wl_driver_inv_en{}".format(row) name_nand = "wl_driver_nand{}".format(row) name_inv2 = "wl_driver_inv{}".format(row) - # add inv1 based on the info above - self.inv1_inst.append(self.add_inst(name=name_inv1, - mod=self.inv_no_output)) - self.connect_inst(["en", - "en_bar_{0}".format(row), - "vdd", "gnd"]) # add nand 2 self.nand_inst.append(self.add_inst(name=name_nand, mod=self.nand2)) - self.connect_inst(["en_bar_{0}".format(row), + self.connect_inst(["en_bar", "in_{0}".format(row), "wl_bar_{0}".format(row), "vdd", "gnd"]) @@ -125,8 +117,7 @@ class wordline_driver(design.design): def place_drivers(self): - inv1_xoffset = 2*self.m1_width + 5*self.m1_space - nand2_xoffset = inv1_xoffset + self.inv.width + nand2_xoffset = 2*self.m1_width + 5*self.m1_space inv2_xoffset = nand2_xoffset + self.nand2.width self.width = inv2_xoffset + self.inv.width @@ -140,13 +131,9 @@ class wordline_driver(design.design): y_offset = self.inv.height*row inst_mirror = "R0" - inv1_offset = [inv1_xoffset, y_offset] nand2_offset=[nand2_xoffset, y_offset] inv2_offset=[inv2_xoffset, y_offset] - # add inv1 based on the info above - self.inv1_inst[row].place(offset=inv1_offset, - mirror=inst_mirror) # add nand 2 self.nand_inst[row].place(offset=nand2_offset, mirror=inst_mirror) @@ -159,7 +146,7 @@ class wordline_driver(design.design): """ Route all of the signals """ # Wordline enable connection - en_pin=self.add_layout_pin(text="en", + en_pin=self.add_layout_pin(text="en_bar", layer="metal2", offset=[self.m1_width + 2*self.m1_space,0], width=self.m2_width, @@ -167,12 +154,11 @@ class wordline_driver(design.design): for row in range(self.rows): - inv1_inst = self.inv1_inst[row] nand_inst = self.nand_inst[row] inv2_inst = self.inv2_inst[row] - # en connection - a_pin = inv1_inst.get_pin("A") + # en_bar connection + a_pin = nand_inst.get_pin("A") a_pos = a_pin.lc() clk_offset = vector(en_pin.bc().x,a_pos.y) self.add_segment_center(layer="metal1", @@ -181,13 +167,6 @@ class wordline_driver(design.design): self.add_via_center(layers=("metal1", "via1", "metal2"), offset=clk_offset) - # first inv to nand2 A - zb_pos = inv1_inst.get_pin("Z").bc() - zu_pos = inv1_inst.get_pin("Z").uc() - bl_pos = nand_inst.get_pin("A").lc() - br_pos = nand_inst.get_pin("A").rc() - self.add_path("metal1", [zb_pos, zu_pos, bl_pos, br_pos]) - # Nand2 out to 2nd inv zr_pos = nand_inst.get_pin("Z").rc() al_pos = inv2_inst.get_pin("A").lc()