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Small format cleanup

This commit is contained in:
mrg 2020-04-01 11:15:29 -07:00
parent da334e47aa
commit 3074cf3b86
2 changed files with 43 additions and 39 deletions
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70
compiler/bitcells/pbitcell.py
View File

@ -7,7 +7,7 @@
# #
import contact import contact
import debug import debug
from tech import drc, parameter from tech import drc, parameter, layer
from vector import vector from vector import vector
from ptx import ptx from ptx import ptx
from globals import OPTS from globals import OPTS
@ -975,42 +975,44 @@ class pbitcell(bitcell_base.bitcell_base):
""" """
Connects wells between ptx modules and places well contacts Connects wells between ptx modules and places well contacts
""" """
# extend pwell to encompass entire nmos region of the cell up to the if "pwell" in layer:
# height of the tallest nmos transistor # extend pwell to encompass entire nmos region of the cell up to the
max_nmos_well_height = max(self.inverter_nmos.well_height, # height of the tallest nmos transistor
self.readwrite_nmos.well_height, max_nmos_well_height = max(self.inverter_nmos.well_height,
self.write_nmos.well_height, self.readwrite_nmos.well_height,
self.read_nmos.well_height) self.write_nmos.well_height,
well_height = max_nmos_well_height + self.port_ypos \ self.read_nmos.well_height)
- self.nwell_enclose_active - self.gnd_position.y well_height = max_nmos_well_height + self.port_ypos \
# FIXME fudge factor xpos - self.nwell_enclose_active - self.gnd_position.y
well_width = self.width + 2*self.nwell_enclose_active # FIXME fudge factor xpos
offset = vector(self.leftmost_xpos - self.nwell_enclose_active, self.botmost_ypos) well_width = self.width + 2*self.nwell_enclose_active
self.add_rect(layer="pwell", offset = vector(self.leftmost_xpos - self.nwell_enclose_active, self.botmost_ypos)
offset=offset, self.add_rect(layer="pwell",
width=well_width, offset=offset,
height=well_height) width=well_width,
height=well_height)
# extend nwell to encompass inverter_pmos # extend nwell to encompass inverter_pmos
# calculate offset of the left pmos well # calculate offset of the left pmos well
inverter_well_xpos = -(self.inverter_nmos.active_width + 0.5 * self.inverter_to_inverter_spacing) \ if "nwell" in layer:
- self.nwell_enclose_active inverter_well_xpos = -(self.inverter_nmos.active_width + 0.5 * self.inverter_to_inverter_spacing) \
inverter_well_ypos = self.inverter_nmos_ypos + self.inverter_nmos.active_height \ - self.nwell_enclose_active
+ self.inverter_gap - self.nwell_enclose_active inverter_well_ypos = self.inverter_nmos_ypos + self.inverter_nmos.active_height \
+ self.inverter_gap - self.nwell_enclose_active
# calculate width of the two combined nwells
# calculate height to encompass nimplant connected to vdd
well_width = 2 * (self.inverter_nmos.active_width + 0.5 * self.inverter_to_inverter_spacing) \
+ 2 * self.nwell_enclose_active
well_height = self.vdd_position.y - inverter_well_ypos \
+ self.nwell_enclose_active + drc["minwidth_tx"]
# calculate width of the two combined nwells # FIXME fudge factor xpos
# calculate height to encompass nimplant connected to vdd offset = [inverter_well_xpos + 2*self.nwell_enclose_active, inverter_well_ypos]
well_width = 2 * (self.inverter_nmos.active_width + 0.5 * self.inverter_to_inverter_spacing) \ self.add_rect(layer="nwell",
+ 2 * self.nwell_enclose_active offset=offset,
well_height = self.vdd_position.y - inverter_well_ypos \ width=well_width,
+ self.nwell_enclose_active + drc["minwidth_tx"] height=well_height)
# FIXME fudge factor xpos
offset = [inverter_well_xpos + 2*self.nwell_enclose_active, inverter_well_ypos]
self.add_rect(layer="nwell",
offset=offset,
width=well_width,
height=well_height)
# add well contacts # add well contacts
# connect pimplants to gnd # connect pimplants to gnd

12
compiler/pgates/ptx.py
View File

@ -196,6 +196,8 @@ class ptx(design.design):
# The well is not included in the height and width # The well is not included in the height and width
self.height = self.poly_height self.height = self.poly_height
self.width = self.active_width self.width = self.active_width
self.well_height = self.height
self.well_width = self.width
# This is the center of the first active contact offset (centered vertically) # This is the center of the first active contact offset (centered vertically)
self.contact_offset = self.active_offset + vector(0.5 * self.active_contact.width, self.contact_offset = self.active_offset + vector(0.5 * self.active_contact.width,
@ -353,10 +355,10 @@ class ptx(design.design):
if not (well_name in layer or "vtg" in layer): if not (well_name in layer or "vtg" in layer):
return return
center_pos = self.active_offset + vector(0.5*self.active_width, center_pos = self.active_offset + vector(0.5 * self.active_width,
0.5*self.active_height) 0.5 * self.active_height)
well_ll = center_pos - vector(0.5*self.well_width, well_ll = center_pos - vector(0.5 * self.well_width,
0.5*self.well_height) 0.5 * self.well_height)
if well_name in layer: if well_name in layer:
self.add_rect(layer=well_name, self.add_rect(layer=well_name,
offset=well_ll, offset=well_ll,
@ -450,7 +452,7 @@ class ptx(design.design):
contact=self.add_via_center(layers=self.active_stack, contact=self.add_via_center(layers=self.active_stack,
offset=pos, offset=pos,
size=(1, self.num_contacts), size=(1, self.num_contacts),
directions=("V","V"), directions=("V", "V"),
implant_type=self.implant_type, implant_type=self.implant_type,
well_type=self.well_type) well_type=self.well_type)