ONENAND_SYS_CFG1_SYNC_WRITE
this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ & ~ONENAND_SYS_CFG1_SYNC_WRITE), this->base + ONENAND_REG_SYS_CFG1);
reg |= ONENAND_SYS_CFG1_SYNC_WRITE;