我们熟悉的存储器器件有随机存取存储器(RAM)和只读存储器(ROM)两种。随机存取存储器是易失性存储器,即在存储器断电后,其所存的数据会全部丢失。但是,RAM的读写速度快,通常为ns(10~(-9)秒)级,因此它常用作计算机的内存。 只读存储器是一种非易失性存储器,也就是说,无论ROM通电与否,存入其内部的数据都可以长期保留。常用的非易失性存储器有EPROM和E~2PROM两种。将数据存入EPROM内 We are familiar with the memory devices are random access memory (RAM) and read-only memory (ROM) two. Random Access Memory is volatile memory, which stores all the data it has lost after the memory is powered down. However, RAM reads and writes fast, usually in the ns (10-9 seconds) level, so it is commonly used as a computer’s memory. Read-only memory is a type of non-volatile memory, meaning that the data stored in it can be retained for long periods of time, regardless of whether the ROM is powered on or not. Commonly used non-volatile memory EPROM and E ~ 2PROM two. The data is stored in the EPROM