P89V51RB2/RC2/RD2 是一款 80C51 微控制器，包含 16/32/64kB Flash 和 1024 字节的数

据RAM。



P89V51RB2/RC2/RD2 的典型特性是它的X2 方式选项。利用该特性，设计工程师可使

应用程序以传统的 80C51 时钟频率（每个机器周期包含 12 个时钟）或X2 方式（每个机器

周期包含6 个时钟）的时钟频率运行，选择X2 方式可在相同时钟频率下获得2 倍的吞吐量。

从该特性获益的另一种方法是将时钟频率减半而保持特性不变，这样可以极大地降低电磁干

扰(EMI)。 -P89V51RB2/RC2/RD2 is an 80C51 microcontroller, including 16/32/64kB Flash and 1024 bytes of data RAM. P89V51RB2/RC2/RD2 typical feature is its X2 mode option. Using this feature, engineers can design the application to the conventional 80C51 clock rate (per machine cycle consists of 12 clock) or X2 mode (each machine cycle consists of six clock) clock frequency operation, select the X2 mode in the same clock frequency was two times the throughput. Benefit from the characteristics of an alternative method is to halve the clock frequency while maintaining the same characteristics, this can greatly reduce the electromagnetic interference (EMI).