def epc_calc_common_mode(reg_dict):
    """
    Returns True if common mode is enabled, False otherwise

    Parameters
    ----------
    reg_dict : dict
        The dictionary that contains all the register information

    Returns
    ----------
    bool
        True if common mode enabled, false otherwise
    """
    cm_enabled = reg_dict["num_dcs"][2] == 0 and reg_dict["mod_sel"][2] == 3
    return cm_enabled