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Move mux select from li to m2 in sky130

This commit is contained in:
mrg 2020-06-26 14:27:16 -07:00
parent 94d7000717
commit c07e20cbe4
1 changed files with 7 additions and 7 deletions
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14
compiler/modules/single_level_column_mux_array.py
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@ -33,8 +33,8 @@ class single_level_column_mux_array(design.design):
self.column_offset = column_offset self.column_offset = column_offset
if "li" in layer: if "li" in layer:
self.col_mux_stack = self.li_stack self.col_mux_stack = self.m1_stack[::-1]
self.col_mux_stack_pitch = self.m1_pitch self.col_mux_stack_pitch = self.m2_pitch
else: else:
self.col_mux_stack = self.m1_stack self.col_mux_stack = self.m1_stack
self.col_mux_stack_pitch = self.m1_pitch self.col_mux_stack_pitch = self.m1_pitch
@ -155,7 +155,7 @@ class single_level_column_mux_array(design.design):
self.route_bitlines() self.route_bitlines()
def add_horizontal_input_rail(self): def add_horizontal_input_rail(self):
""" Create address input rails on M1 below the mux transistors """ """ Create address input rails below the mux transistors """
for j in range(self.words_per_row): for j in range(self.words_per_row):
offset = vector(0, self.route_height + (j - self.words_per_row) * self.col_mux_stack_pitch) offset = vector(0, self.route_height + (j - self.words_per_row) * self.col_mux_stack_pitch)
self.add_layout_pin(text="sel_{}".format(j), self.add_layout_pin(text="sel_{}".format(j),
@ -177,10 +177,10 @@ class single_level_column_mux_array(design.design):
# use the y offset from the sel pin and the x offset from the gate # use the y offset from the sel pin and the x offset from the gate
offset = vector(gate_offset.x, offset = vector(gate_offset.x,
self.get_pin("sel_{}".format(sel_index)).cy()) self.get_pin("sel_{}".format(sel_index)).cy())
# Add the poly contact with a shift to account for the rotation self.add_via_stack_center(from_layer="poly",
self.add_via_center(layers=self.poly_stack, to_layer=self.col_mux_stack[0],
offset=offset, offset=offset,
directions=self.via_directions) directions=self.via_directions)
self.add_path("poly", [offset, gate_offset]) self.add_path("poly", [offset, gate_offset])
def route_bitlines(self): def route_bitlines(self):