URTW_EPROM_CMD_SHIFT
data = (data & ~URTW_EPROM_CMD_MASK) | (mode << URTW_EPROM_CMD_SHIFT);
(URTW_EPROM_CMD_NORMAL << URTW_EPROM_CMD_SHIFT)
(URTW_EPROM_CMD_PROGRAM << URTW_EPROM_CMD_SHIFT)