Can you explain the following diagram

[pairofstrings]

I am trying to figure how the pins of 8086 are connected to different elements in the circuit?
I don't understand how at this level the pins can be connected. can you explain?
Is the second diagram suppose to be the internal view of the first diagram?
The figure shows that there are 40 pin on that IC. How and where are all these pins used?

 

[Studiot]

Not quite sure what your questions means but here is some information.

The pins in devices like microprocessors are divided into functional groups called busses.

In the 8086 there are 3 main busses, in addition to a few clock, power, ground and miscellaneous pins.

The Data Bus
The Address Bus
The Control Bus.

The data bus is bidirectional so that the chip can read in or out the data.
One of the lines or pins on the control bus determines which way the data flows.
There are again 16 lines (pins) on the data bus.

The address bus simply informs the outside circuitry which memory address is required for access so is basically unidirectional. It has 16 lines or pins, labelled AD0 through AD15.

Now the 'clever' part is that the same pins are used for both data and addresses, but not at the same time. This is unlike the predecessor chips, the 8080 and 8085.


The control bus is self explanatory.

Your second diagram shows the busses and the internal connections as 'wide' arrows between the registers which receive, hold and transmit the data and other functoinal parts of the processor.

More information can be found here.

http://www.scribd.com/doc/7089071/8086-User-Manual

 

[berkeman]

View attachment 35809

View attachment 35810

I am trying to figure how the pins of 8086 are connected to different elements in the circuit?
I don't understand how at this level the pins can be connected. can you explain?
Is the second diagram suppose to be the internal view of the first diagram?
The figure shows that there are 40 pin on that IC. How and where are all these pins used?

I used Google Images to get some good pin/block diagrams of 8086s:

http://www.google.com/search?tbm=is...block+diagram&gbv=2&aq=7&aqi=g10&aql=&oq=8086

This one in particular may be of help...

http://www.mans.eun.eg/faceng/english/computers/Cources/Dig%204/4-9.HT33.gif

[PLAIN]http://www.mans.eun.eg/faceng/english/computers/Cources/Dig%204/4-9.HT33.gif