OpenRAM/technology/sky130/custom/sky130_dummy_bitcell.py

#!/usr/bin/env python3
# See LICENSE for licensing information.
#
# Copyright (c) 2016-2023 Regents of the University of California
# All rights reserved.
#

from openram import debug
from openram.modules import bitcell_base
from openram.tech import cell_properties as props


class sky130_dummy_bitcell(bitcell_base):
    """
    A single bit cell (6T, 8T, etc.)  This module implements the
    single memory cell used in the design. It is a hand-made cell, so
    the layout and netlist should be available in the technology
    library.
    """
    def __init__(self, version, name=""):
        # Ignore the name argument

        if version == "opt1":
            cell_name = "sky130_fd_bd_sram__openram_sp_cell_opt1_dummy"
        elif version == "opt1a":
            cell_name = "sky130_fd_bd_sram__openram_sp_cell_opt1a_dummy"
        super().__init__(name, cell_name, prop=props.bitcell_1port)
        debug.info(2, "Create dummy bitcell")

    def build_graph(self, graph, inst_name, port_nets):
        """ Adds edges based on inputs/outputs. Overrides base class function. """
        pass