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特殊寄存器ABC(C是位寄存器)
阅读量：
131 次
发布时间：
2019-02-27
本文共 167 字，大约阅读时间需要 1 分钟。
单片机MCS-51中：
1、A是累加器，是使用频率最高的特殊寄存器。绝大多数的算术、逻辑运算都要有累加器参与完成；使用累加器传送数据也是效率最高的。
2、B是通用寄存器，也是唯一可以参与乘、除运算指令的寄存器。
3、C是进位位，属于位存储器，也是布尔处理机进行位运算最常用的位寄存器，同时受某些算术、逻辑运算指令影响，表征结果的状态。
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