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confused about controller

vead

Nov 27, 2011
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I am confused about controller how they make I mean how we can decide how many bit are required to make device I want to make 8 bit micro controller now I have decided to make 8 bit micro controller ok so next controller make with CPU and MEMORY
1) how many bit are required to make CPU?
 

donkey

Feb 26, 2011
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ok for starters.... I would really appreciate this being written so I can understand it.
CPU's come in various bits.... 8bit micro controllers through to 64bit CPU's.... there may be higher and even lower values but I cant think of them
what are your wanting to do?
http://www.webopedia.com/TERM/B/bit.html
this might help somewhat but still am stuck on your explanation
 

vead

Nov 27, 2011
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ok for starters.... I would really appreciate this being written so I can understand it.
CPU's come in various bits.... 8bit micro controllers through to 64bit CPU's.... there may be higher and even lower values but I cant think of them
what are your wanting to do?
http://www.webopedia.com/TERM/B/bit.html
this might help somewhat but still am stuck on your explanation
I have little confused please correct me if i am wrong
specification for controller
micro controller - 8 bit
CPU - 8 bit
ALU - 8 bit
DECODER - 8 bit
IS it correct ?
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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25,510
We can't really help because we don't know what your asking.

Perhaps you can give us some background describing what you're doing.
 

vead

Nov 27, 2011
473
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Nov 27, 2011
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We can't really help because we don't know what your asking.

Perhaps you can give us some background describing what you're doing.

I want to design 8 bit micro controller on computer so I need specification I know the main part of controller make with CPU and MEMORY CPU make with ALU and control unit
my question
1) how many bit are required to make CPU?
2)how many bit are required to make ALU ?

how to decide how many bit are required to make device?
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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25,510
1) how many bit are required to make CPU?

Well, the first microcontrollers were 4 bit devices...

2)how many bit are required to make ALU ?

Anything less than 2 bits would be pointless (and 2 bits is pretty pointless)

how to decide how many bit are required to make device?

That still doesn't make any sense.

Is this an assignment? Perhaps you should tell us what the *exact* wording of the assignment is.
 

vead

Nov 27, 2011
473
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Is this an assignment? Perhaps you should tell us what the *exact* wording of the assignment is.

that's not assignment I have little knowledge about digital circuit .now I want assemble that component like adder, decoder multiplexer ...etc and want to make 8 bit controller

first I thought to make 8 bit controller I know I need CPU and MEMORY then next question came in my mind If i make 8 bit micro controller what should be the CPU and if CPU is 8 bit then what should be the ALU
 
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