Digital Design (4th Edition)

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Memory and Programmable Logic Chapter 7 By Suleyman TOSUN Ankara University
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Outline s RAM s Memory decoding s Error detection and correction s ROM s Programmable Logic Array (PLA) s Programmable Array Logic (PAL)
Background image of page 2
Memories s Memory unit is a collection of cells capable of storing a large quantity of binary information. b Information from input device is stored in memory b Information to output is taken from memory s Two types of memories b Random-access memory (RAM) s Stores binary info for later use s Write operation: Storing data into memory s Read operation: Transferring data out of memory b Read-only memory (ROM) s Can perform only read operation
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
RAM vs ROM s ROM is a programmable logic device (PLD). b The binary information is embedded within the hardware. s Other programmable devices b Programmable logic array (PLA) b Programmable array logic (PAL) b Field programmable gate array (FPGA) s Since PLSs have a lot of gates and paths, gates in array logic is shown in different way.
Background image of page 4
Random-Access Memory (RAM) s The time it takes to transfer to or from any random location always the same b That’s why the name random access memory . b In magnetic tapes, the time depends on the location of the data.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Word size s 4 bits - nibble s 8 bits - byte s 16 bits – 2 bytes s 32 bits – 4 bytes s Most computer uses multiples of 8 bits s The capacity of a memory is stated as the total number of bytes.
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 42

Chapter7 - Memory and Programmable Logic Mano & Ciletti...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online