docs: def is_readable(self):
          """ Return true if the efuse is readable by software """
          if self.read_disable_bit is None:
              return True  # read cannot be disabled
          value = (self.parent.read_efuse(0) >> 16) & 0xF  # RD_DIS values
          return (value & (1 << self.read_disable_bit)) == 0