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本文介绍一种只读存聍器,而且只介绍熔丝型。所谓只读存聍器,就是说这种存聍器制成之后,只具有读出能力,而无随机写入功能。它在计算机中用作存放固定函数、常数、专用机中的固定程序。特别随着微程序技术在数字机中的广泛应用,对只读存聍器的要求也越来越多。在多功机里用了这种PROM。元件厂可以按用户提供的程序内容,生产不同类型的只读存聍器,这显然是不经济的。因此,元件厂只生产一种全“0”(或全“1”)的存聍矩阵,由用户自己用电写
This article describes a read only memory device, and only introduces the fuse type. The so-called read-only memory device, that is made of this memory device, only read capacity, but no random write function. It is used in computers as a fixed function for storing fixed, constant, special-purpose machines. Especially with the widespread application of micro-program technology in digital machines, more and more requirements for read-only memory devices. In the multi-machine used this PROM. The component factory can produce different types of read-only memory according to user-provided program contents, which is obviously uneconomical. Therefore, the component factory produces only a full “0” (or all “1”) memory matrix, by the user’s own electricity write