openlane/user_project_wrapper/pdn.tcl

# Copyright 2020 Efabless Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Power nets
set ::power_nets $::env(_VDD_NET_NAME)
set ::ground_nets $::env(_GND_NET_NAME)

pdngen::specify_grid stdcell {
    name grid
	core_ring {
		met5 {width $::env(_WIDTH) spacing $::env(_SPACING) core_offset $::env(_H_OFFSET)}
		met4 {width $::env(_WIDTH) spacing $::env(_SPACING) core_offset $::env(_V_OFFSET)}
	}
	rails {
	}
    straps {
	    met4 {width $::env(_WIDTH) pitch $::env(_V_PITCH) offset $::env(_V_PDN_OFFSET)}
	    met5 {width $::env(_WIDTH) pitch $::env(_H_PITCH) offset $::env(_H_PDN_OFFSET)}
    }
    connect {{met4 met5}}
}

pdngen::specify_grid macro {
	instance "obs_core_obs"
    power_pins $::env(_VDD_NET_NAME)
    ground_pins $::env(_GND_NET_NAME)
    blockages "li1 met1 met2 met3 met4 met5"
    straps { 
    } 
    connect {}
}


pdngen::specify_grid macro {
    power_pins $::env(_VDD_NET_NAME)
    ground_pins $::env(_GND_NET_NAME)
    blockages ""
    straps { 
    } 
    connect {}
}

set ::halo 0

# POWER or GROUND #Std. cell rails starting with power or ground rails at the bottom of the core area
set ::rails_start_with "POWER" ;

# POWER or GROUND #Upper metal stripes starting with power or ground rails at the left/bottom of the core area
set ::stripes_start_with "POWER" ;