14

15
16

17

18

19

20

a)
b)
a)
b)
a)
b)

a)

b)

a)
b)

00000CS305121902

Interface two numbers of 16Kx8 EPROM and 2 numbers of 4Kx8 RAM to
8086. Select suitable address map.
PART E

Answer any four full questions, each carries10 marks.
Describe Internal data memory organization of 8051 microcontroller.
Explain PSW of 8051 microcontroller
Explain how external memories can be interfaced to 8051 microcontroller
Explain the organization of stack in 8051 microcontrollers.
Explain the sources of interrupts of 8051 microcontroller.
What is the role of IE and IP registers of 8051 microcontroller
Describe the following instructions of 8051 microcontroller.
a) AJMP b)SJMP = =c)XCHD d)MOVX ©) ۸۲
Write an 8051 assembly language program to count the occurrence of a given
byte in a sequence of n bytes.
Write the criteria for selecting a microcontroller.
Explain the block diagram of 8254, programmable interval timer.
Explain the following addressing modes of 8051 microcontroller.

a) Register indirect 9) Indexed

(9)

(10)
(5)
(5)
(5)
(5)
(5)
(5)

(7)

(3)

(6)
(4)