XC866 是高性能 8 位微控制器XC800 的系列产品，基于和标准8051 处理器兼容

的XC800 核。XC866 高度集成片内器件，例如片内振荡器或嵌入式电压调节器（从而

可由3.3V 或5.0V 的单电源供电） ，因此具备了许多增强功能以满足新型应用。此外，

嵌入式闪存（Flash）器件为系统开发和批量生产提供了很大的灵活性；兼容ROM器件

为大批量生产提供了节省成本的空间。-XC866 8-bit microcontroller is a high-performance XC800 series of products, based on and compatible with standard 8051 processor XC800 core. XC866 highly integrated chip devices, such as on-chip oscillator or embedded voltage regulator (3.3V or 5.0V to be a single power supply), so have a number of enhancements to meet new applications. In addition, the embedded flash memory (Flash) devices for the system development and mass production provides a great deal of flexibility　compatible ROM devices to provide high-volume production cost of space.