VLSI 1

[T5]

Hi,

i am currently studying a subject on Very Large Scale Integration.

i was wondering if anyone had any information (what they are, what they do, general function of each device and specific devices which perform the function and two chips for the PIO,PISO and CTC) on:

1)MOS RAM,
2)Parallel Input/Output Device,
3)Parallel-in/Serial-out Device,
4)Counter Timer Chip.

Flowcharts which describe how data is written to and from:

5)Static Ram
6)EPROM

lastly, does any one have short historical rewiew concerning the development of VLSI devices?

thanx in advance!

T5...

 

[MMAshwin]

Hi,

As you already know, a VLSI chip is any IC wich contains between 100,000 & 1,000,000 logic gates.

So in response to the part of your question
"what they are, what they do, general function of each device"
its a bit of a tall order !. There are hundreds of chips out there if not thousands who are consructed by VLSI. This includes but not limited uprocessors, ucontrollers, RAM, ROM, PALs, GALs, PIAs, VIAs --- well you get the picture.

Being such a big subject I suggest a book such as
Fundamentals of Modern VLSI Devices by Yuan Taur, Tak H. Ning
See:-

http://uk.cambridge.org/materials/catalogue/0521559596/

or
Low-Voltage SOI CMOS VLSI Devices and Circuits
James B. Kuo, Shih-Chia Lin
See:-

http://www.wiley.com/Corporate/Website/Objects/Products/0,9049,1798051,00.html

As far as a flowchart on writing info to and from RAM/ROM what are you writing from ?. I only ask because if its just a simple microcontroller/CPU its just
Address/data/Control/ for a write cycle
Address/Control for a read cycle.

Where
Address = The xbit address of the data you wish to read write from.
Data = The xbit data you wish to write into RAM
Control = The control signals for the RAM/ROM i.e CE RD WD
See the follwoing for more detail:-

http://www.erg.abdn.ac.uk/users/gorry/eg2069/dispatch.html

If its for a more complex system then is DMA being used? If so then it gets a little more complex because you may have to check the busses for activity first.
See:-

http://www.howstuffworks.com/computer-memory.htm/printable

As for the history of VLSI design then check out the following link :-

http://www.cs.stir.ac.uk/courses/31R6/lssvlsi1.pdf

Or history of the whole thing:-

http://www.ee.vt.edu/~mishra/Lecture2.pdf

Any help ?, yes no let me know.

Regards

 

[Scotsdude]

i would like to nominate Laffalot for the position of God, cos the boy knows everything......

 

[MMAshwin]

Hi,

If that was a compliment then Tanks you.
It's thanks to my Scotish blood (engineering skills).

If not then
MMMMMMmmmmmmmmmmmmmmmm............. ! Any help ?, yes no let me know.

Regards

 

[T5]

Thank you Laffalot, you have been of great help.

i was wanting Flowcharts which describe how data is written to and from the Static Ram and EPROM. do you have any flow charts?

thank you very much...

T5.

 

[melone]

This isn't for a school project is it? If so, it would be very unethical to have professionals do your work for you. The reason I ask is b/c based on application notes, specs, etc., you should be able to derive the data flowchart without any problem.

 

[T5]

No no no.....this is no school project! at 24 years old, i am well passed school. i have taken up a course on computing where it is basically do the work yourself. although this may seem that i am asking alot of 'homework' questions is just that i got started on the work, and i got stuck. i have searched all over the net and looked in alot of Computer Engineering books, but i couldnt seem to find the info i was looking for.

Laffalot has been of great help. with the flow charts that describe how data is written to and from the Static Ram and EPROM, will help me alot in understanding data transfer.

laterz....

 

[MMAshwin]

Hi Again,

Are you wanting a fetch cycle (i.e. what the CPU is doing) or just what is happening on the busses or is a bit of both.

I might add that I see no difference between RAM & EPROM as far as accessing data is concerned. They both have address, control and data lines. However as you know EPROM can only be read from (disregarding the special programming voltages and algorithms required to write to them).
Any help ?, yes no let me know.

Regards

 

[T5]

hi there!

i have worked out the flowcharts myself so i am ok with that, but thanx anyway!

i was wondering if you had any information on:

Parallel Input/Output Device,
Parallel-in/Serial-out Device,
Counter timer Chips

i'd like to know what they do, general function of each device and specific devices which perform the function and two chips for the PIO,PISO and CTC.

thanx n laterz......