BLOCK DIAGRAM OF HARDWIRED CONTROL UNIT IN CA

1. COMPUTER ARCHITECTURE
NAME-RAHUL SHARMA
COURSE-BCA 3RD SEM (E)
FACULTY-MRS. SUMAN SINGH

2. BLOCK DIAGRAM OF HARDWIRED
CONTROL UNIT
CONTROL UNIT

3. KINDS OF CONTROL UNIT
• THERE ARE TWO KINDS OF CONTROL UNIT
1) HARDWIRED CONTROL UNIT
2) MICRO PROGRAMMED CONTROL UNIT

4. HARDWIRES CONTROL UNIT
• CONTROL UNIT IS MADE UP OF
SEQUENTIAL AND COMBINATIONAL
CIRUITS TO GENERATE THE CONTROL
SIGNALS.
• ADVANTAGE-CAN BE OPTIMEZED TO
PRODUCED FAST MODE OF
OPERATION
• DISADVANTAGE-REQUIRE CHANGE IN
WIRING IF THE DESIGNED HAS TO BE
CONTROLLED

5. Computer Architecture BCA203 by Suman
Singh
5
Hardwired Timing And Control Unit
Control unit of Basic Computer
Instruction register (IR)
15 14 13 12 11 - 0
3 x 8
decoder
7 6 5 4 3 2 1 0
I
D 0
15 14 . . . . 2 1 0
4 x 16
decoder
4-bit
sequence
counter
(SC)
Increment (INR)
Clear (CLR)
Clock
Other inputs
Control
signals
D
T
T
7
15
0
Combinational
Control
logic