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微型计算机现已开始在广泛领域中应用。这种微型计算机是由于LSI技术的进展,已出现的单片微处理机作为控制中心,在其周围把RAM,ROM,PROM、输入输出通道等外围电路适当组合成的单台计算机。在这种微型计算机中使用的存储器,其容量是从数K字到数10 K字,其使用方法也有多种多样。这里主要叙述微型计算机使用的MOSRAM(静态/动态)、PROM(电可写入的RO-M)、掩模ROM等。微型计算机用的RAM 1 分类按照工作特性RAM可分为静态型和动态型,按构成电路的元件特性,可分为PMOS、NMOS、CMOS几种。静态型RAM如图1所示,存储单元由晶体管Q_1～Q_6构成触发器结
Microcomputers are now beginning to be used in a wide range of applications. This type of microcomputer is due to the progress of LSI technology. A single-chip microprocessor that has appeared as a control center has a single computer in which peripheral circuits such as RAM, ROM, PROM, input / output channels and the like are appropriately combined. The memory used in such microcomputers has a capacity ranging from a few K words to a few 10 K words and its use is varied. Here mainly describes the use of microcomputer MOSRAM (static / dynamic), PROM (electrically-writable RO-M), mask ROM and so on. Microcomputer RAM 1 classification According to the working characteristics RAM can be divided into static type and dynamic type, according to the components of the circuit characteristics, can be divided into several kinds of PMOS, NMOS, CMOS. Static RAM as shown in Figure 1, the memory cell by the transistor Q_1 ~ Q_6 flip-flop junction