"Permanent" memory is called ROM. ROM stands for Read Only Memory. Under normal circumstances, ROM can not be modified or erased, even if the computer loses power.
A flash memory chip is a close relative to EEPROM, it differs in that it can erase one block or page at a time. Therefore flash memory is a non volatile memory.
In the case of an EPROM chip - The chip is plugged into an EPROM (Erasable Programmable Read Only Memory) machine. Each microchip has a small amount of memory, and the EPROM machine effectively writes instructions to the chip's memory. These machines usually program large batches of chips at the same time. This set of instructions is permanent unless the chip is re-programmed.
what is the function of the wr signal on memory chip
On-chip memory is a memory that resides on microcontroller itself. e.g RAM. It may be one of the Internal RAM or Special Function Register (SFR). Off-chip memory is external ROM or EPROM.
Permanent
rom chip
BIOS chip
Registers represent the number of memory locations. A 2K memory chip has 2x1024=2048 memory locations. Hence there are 2048 registers in a 2K memory.
There's no such thing. The iphone does not have a memory chip you can plug in. If you mean internal spare parts then ebay.
To install laptop memory, you will need to first consult the instruction manual. Afterwards, you can buy the memory chip, open up the laptop and then place the memory chip inside.
It is integrated with Processor. Also called Cache Memory.