Font size
WorksheetsChapter 15 Control Unit Operation
Total questions: 25
Worksheet time: 28mins
It connects to the system bus's address lines. It provides the memory address for a
read or write operation.
Answer:
(a)
2. In this stage, source operands are fetched. Indirect addressing is used to retrieve the source operand.
Answer:
(a)
This is the functional or atomic operation of a processor.
Answer:
(a)
An instruction is fetched from memory at the beginning of each cycle of instructions.
a. Indirect Cycle
b. Execute Cycle
c. Fetch Cycle
d. Micro-Operation
The system bus's data lines are connected to it. It includes the value that will be
saved in memory or the most recent value that was read from memory.
a. Memory Address Register.
b. Instruction Register
c. Program Counter
d. Memory Buffer Register
a. Memory Address Register.
b. Instruction Register
c. Program Counter
d. Memory Buffer Register
At the completion of the execute cycle, a test is made to determine whether any enabled interrupts
have occurred. If so, (a) occurs.
ANSWER: The Interrupt Cycle
Each phase of (a) can be decomposed into a sequence of elementary micro-operations.
ANSWER:
It is connected to the address lines of the system bus. It specifies the address in memory for a read or
write operation.
A. Memory address registers (MAR)
B. Memory Buffer Register (MBR)
C. Program Counter (PC)
D. Instruction Register (IR)
The ______, _______, and _______ are simple and predictable. Each involves a small, fixed sequence
of micro-operations and, in each case, the same micro-operations are repeated each time around.
A. FETCH, INSTRUCTION AND INTERRUPT
B. FETCH, INDIRECT, AND INTERRUPT
C. FETCH, INDIRECT AND MICRO OPERATION
D. INDIRECT, MICRO OPERATION AND INTERRUPT
What is ICC?
A. Instruction Cycle Code
B. Indirect Cycle Code
C. Interrupt Cycle Code
D. Integration Cycle Code
What are the basic functional elements of the processor except one?
a. ALU
b. Control Unit
c. RAM
d. Registers
In Execution, the control unit causes the processor to step through a series of micro-operations in the proper sequence, based on the program being executed.
• TRUE
• FALSE
What is the purpose of internal data paths?
These are used to store data internal to the processor
Answer:
(a)
What are the two basic task of a control Unit?
Answer:
(a)
What controls data transfer to and from the external data busses?
Control Signals
40 pins
Serial Output Data
High Address
What are the functions of pins A15 – A18?
Control Signals
40 pins
Serial Output Data
High Address
In the processor, there is a pin called SOD. What does SOD stand for?
Control Signals
40 pins
Serial Output Data
High Address
How many pins are there in the Intel 8085 processor?
Control Signals
40 pins
Serial Output Data
High Address
List at least 3 pins of the Intel 8085 processor:
It is the most practical way to design a somewhat complex controller.
Answer:
(a)
The standard algorithmic approach to designing the Notes controller utilizing the classical state
table method is used in this method.
Answer:
(a)
For creating the sequence of control signals, this method relies on the usage of timed delay
elements.
Answer:
(a)
What is a Hardwired Control Unit?
Give the characteristics of Hardwired Control Unit.
