Working of ROM
A small, long-lasting battery within the computer powers the ROM, which is made up of two primary components: the OR logic gates and the decoder. In ROM, the decoder receives binary input and produces decimal output. The decoder’s decimal output serves as the input for ROM’s OR gates. ROM chips have a grid of columns and rows that may be switched on and off. If they are turned on, the value is 1, and the lines are connected by a diode. When the value is 0, the lines are not connected. Each element in the arrangement represents one storage element on the memory chip. The diodes allow only one direction of flow, with a specific threshold known as forward break over. This determines the current required before the diode passes the flow on. Silicon-based circuitry typically has a forward break-over voltage of 0.6 V. ROM chips sometimes transmit a charge that exceeds the forward break over to the column with a specified row that is grounded to a specific cell. When a diode is present in the cell, the charge transforms to the binary system, and the cell is “on” with a value of 1.
Read Only Memory (ROM)
In a computer system, memory is a very essential part of the computer system and is used to store information for instant or permanent use. Based on computer memory working features, memory is divided into two types i.e. Volatile and Non-Volatile Memory. Before understanding ROM, we will first understand what exactly volatile and non-volatile memory is. Non-volatile memory is a type of computer memory that is used to retain stored information during power is removed. It is less expensive than volatile memory. It has a large storage capacity. ROM (read-only memory), and flash memory are examples of non-volatile memory. Whereas volatile memory is a temporary memory. In this memory, the data is stored till the system is capable of, but once the power of the system is turned off the data within the volatile memory is deleted automatically. RAM is an example of volatile memory.