def _enter_bootloader_mode(self):
return True if self.cnxn.xfer(<NUM_LIT>)[<NUM_LIT:0>] == <NUM_LIT> else False<EOL>
Enter bootloader mode. Must be issued prior to writing
        configuration variables to non-volatile memory.

        :rtype: boolean

        :Example:

        >>> alpha._enter_bootloader_mode()
        True