Operation of micro-programmed control unit, Computer Engineering

Assignment Help:

Micro-instructions are stored in control memory. Address register for control memory comprises the address of subsequent instruction which is to be read. Control memory Buffer Register receives micro-instruction which has been read. A particular micro-instruction execution mainlyincludes the generation of desired control signals and signals used to determine the subsequent micro-instruction to be executed. Sequencing logic section loads control memory address register. It issues a read command to control memory. The subsequent functions are performed by micro-programmed control unit:

1. Sequence logic unit specifies address of the control memory word which is to be read in the Address Register of Control Memory. It also issues READ signal.

2. Desired control memory word is read into control memory Buffer Register.

3. Content of the control memory buffer register is decoded to create control signals and subsequent-address information for sequencing logic unit.

4. Sequencing logic unit finds address of next control word on the foundation of next-address information from decoder and ALU flags.

The execute cycle steps of micro-operations are different for every instructions additionally the addressing mode can be different. All such information normally is dependent on opcode of the instruction Register (IR). So IR input to Address Register for Control Memory is desirable. So there exist a decoder from IR to Address Register for control memory.


Related Discussions:- Operation of micro-programmed control unit

Show the classification of networks, There are various approaches to the cl...

There are various approaches to the classification of Computer Networks. One such classification is based on distance approach. Networks can be classified into LAN, WAN and MAN net

Determine by which final selector is connected, The final selector is conne...

The final selector is connected to the (A) calling subscriber.                     (B) switching network. (C) called subscriber.                      (D) li

A subroutine can contain nested form and endform blocks, A subroutine can c...

A subroutine can contain nested form and endform blocks. False.

What do you mean by term procedure, What do you mean by term procedure? Dif...

What do you mean by term procedure? Differentiate between far call and near call? PROC: PROC and ENDP directives indicate the start and end of a procedure. These directives for

What are the different methods of passing data, What are the different meth...

What are the different methods of passing data? There are three different methods of passing data Calling by reference    Calling by value Calling by value and result

Discuss the advantages of store program control, Discuss the advantages of ...

Discuss the advantages of store program control (SPC) automation in telephone switching. Advantages of SPC: (i) Simple to control (ii) Simple to maintain (iii) Fine-

What is the demand of mobile application developers, Desktop based IT appli...

Desktop based IT application is present but the mobile is future. All the applications that were made to work only on counter top are being ported to mobile. In the coming 10 years

What is linked list, Q. What is Linked List? A linked list is a data st...

Q. What is Linked List? A linked list is a data structure formed by zero or more nodes linked by pointers. Every node has two parts as shown in Figure below. One of them is inf

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