instruction fetching need help?

[ved]

micro controller contain mainly ALU, control unit ROM , RAM, PORT

Processor take information from ROM, RAM, Input port

fetching – decoder take command from rom memory

decode – decoder decode instruction and tell the cpu what to do like add, sub

execution- alu do the operation like add, sub.. and sand the result into ram memory

processor take input from the input port

I just want to know how does ALU, DECODEr, RAM, ROM, I/o port work together   I know its broad question but someone please explain little bit?

[g.hari kumar]

I too need the clarification reguarding the querie

but as i know that in the advacement of the controller the cpu is designed to handel concurrent programming .

for example in initial stage of  8051 some instructions takes 7 to 8 machine cycyles to completely execute as the technology has advanced the present day cpu takes 1-2 machine cycle as the cpu can handle parallel processing.

its just up to my knowledge.if it is wrong please  get the correct answer

[Author]

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