Each row of cells constitutes a memory word, and all cell of a row are connected to a common line which is referred as word line. An address decoder is used to drive the word line. At a particular instant, one word line is enabled depending on the address present in the address bus. The cells in each column are connected by two lines. These are known as bit lines. These bit lines are connected to data input line and data output line through a Sense/Write circuit. During a Read operation, the Sense/Write circuit sense, or read the information stored in the cells selected by a word line and transmit this information to the output data line. During a write operation, the sense/write circuit receive information and store it in the cells of the selected word.

A memory chip consisting of 16 words of 8 bits each, usually referred to as 16 x 8 organization. The data input and data output line of each Sense/Write circuit are connected to a single bidirectional data line in order to reduce the pin required. For 16 words, we need an address bus of size 4. In addition to address and data lines, two control lines, and CS, are provided. The line is to used to specify the required operation about read or write. The CS (Chip Select) line is required to select a given chip in a multi chip memory system.

Consider a slightly larger memory unit that has 1K (1024) memory cells...