Memory address decoding-microprocessor, Assembly Language

Assignment Help:

Memory Address Decoding

Binary Decoders - Decoders have 2n-inputs and n outputs, each input combination results in a single output line contain a 1, and all other lines contain a 0 on the output. Examples of use are decoding memory addresses and CPU instructions.Typically Decoders have an enable when 1 enables decoding the input to 1 on a single output, when not enabled all outputs are zero. The switching function for an enabled 2-input binary decoder is:

1802_switching func1.jpg

The 2 to 4 decoder representation is:

238_2-4 decoder.jpg

1637_2 inputs.jpg

Memory Address Decoding - Figure indicate a 16K by 1 bit word memory (8 bit words are implemented by selecting 8 bits as a group, for instance). Since 214 is about 16K, a single decoder would require 14 inputs and 214 output

196_ram modules.jpg

359_decoder.jpg

The memory decoder is linked to the CPU by the address bus. Each memory cell is linked to an output and input data bus, a write/read control, and the decoder which enables the memory cell when the suitable address appears. The decoder ensures that just a single memory cell is activated at a time for either output or input.


Related Discussions:- Memory address decoding-microprocessor

Assigment help, assempbly language routine that takes an array named A cont...

assempbly language routine that takes an array named A containing n bytes of postive numebrs and fills two arranys, array B containing n words and array C containing n long words

Intel''s 8237 dma controller-microprocessor, Intel's 8237 DMA controller : ...

Intel's 8237 DMA controller : 1) The 8237 contain 4 independent I/O channels 2) It contains 27 registers, 7 of which are system-wide registers and 5 for each channel. 3)

Encrypting, write an assembly language program that has two subroutines : o...

write an assembly language program that has two subroutines : one for encrypting alphabates of a string and second fo decrypting the encoded string . in encryption simply converta

8086, to separate positive and negative numbers

to separate positive and negative numbers

Programming., a program that display English letters excluding vowels

a program that display English letters excluding vowels

Totorial, How can i starting with Assembly langauge?

How can i starting with Assembly langauge?

Program., write a Mips program that read a string AND PRINT IT ON THE SCREE...

write a Mips program that read a string AND PRINT IT ON THE SCREEN

Program help, Could I get an estimate on how much it would cost to write a ...

Could I get an estimate on how much it would cost to write a program in assembly language?

Computer organization, write a program using assembly language that print y...

write a program using assembly language that print your name

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd