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Move pnand2 output to allow input pin access on M2

This commit is contained in:
Matt Guthaus 2018-11-26 13:59:53 -08:00
parent 8fba32ca12
commit 5209619987
1 changed files with 12 additions and 5 deletions
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17
compiler/pgates/pnand2.py
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@ -192,26 +192,33 @@ class pnand2(pgate.pgate):
""" Route the Z output """ """ Route the Z output """
# PMOS1 drain # PMOS1 drain
pmos_pin = self.pmos1_inst.get_pin("D") pmos_pin = self.pmos1_inst.get_pin("D")
top_pin_offset = pmos_pin.center()
# NMOS2 drain # NMOS2 drain
nmos_pin = self.nmos2_inst.get_pin("D") nmos_pin = self.nmos2_inst.get_pin("D")
bottom_pin_offset = nmos_pin.center()
# Output pin # Output pin
mid_offset = vector(nmos_pin.center().x,self.inputA_yoffset) out_offset = vector(nmos_pin.center().x + self.m1_pitch,self.inputA_yoffset)
# Midpoints of the L routes go horizontal first then vertical
mid1_offset = vector(out_offset.x, top_pin_offset.y)
mid2_offset = vector(out_offset.x, bottom_pin_offset.y)
self.add_contact_center(layers=("metal1", "via1", "metal2"), self.add_contact_center(layers=("metal1", "via1", "metal2"),
offset=pmos_pin.center()) offset=pmos_pin.center())
self.add_contact_center(layers=("metal1", "via1", "metal2"), self.add_contact_center(layers=("metal1", "via1", "metal2"),
offset=nmos_pin.center()) offset=nmos_pin.center())
self.add_contact_center(layers=("metal1", "via1", "metal2"), self.add_contact_center(layers=("metal1", "via1", "metal2"),
offset=mid_offset, offset=out_offset,
rotate=90) rotate=90)
# PMOS1 to mid-drain to NMOS2 drain # PMOS1 to mid-drain to NMOS2 drain
self.add_path("metal2",[pmos_pin.bc(), mid_offset, nmos_pin.uc()]) self.add_path("metal2",[top_pin_offset, mid1_offset, out_offset, mid2_offset, bottom_pin_offset])
# This extends the output to the edge of the cell # This extends the output to the edge of the cell
self.add_layout_pin_rect_center(text="Z", self.add_layout_pin_rect_center(text="Z",
layer="metal1", layer="metal1",
offset=mid_offset, offset=out_offset,
width=contact.m1m2.first_layer_height, width=contact.m1m2.first_layer_height,
height=contact.m1m2.first_layer_width) height=contact.m1m2.first_layer_width)