STUPIDSID
1 (a)
Explain T-state, Machine cycle and Instruction cycles
5 M
1 (b)
Why address and data bus are multiplexer? Explain how they demultiplexer in 8085
5 M
1 (c)
Differentiate SJMP, AJMP and LJMP instructions of 8051
5 M
1 (d)
Write assembly language program for 8051 to read the data from port lines P1.0 to P1.3 and P2.0 to P2.3, if data are equal then send FFH to PORT 3 else OOH
5 M
2 (a)
Explain interrupt structure of 8085
10 M
2 (b)
Explain internal memory organization of 8051 microcontroller
10 M
3 (a)
Draw and explain timming diagram for instruction INR M
10 M
3 (b)
Draw and explain the architecture of ARM processor
10 M
4 (a)
Explain the control word register format of 8253. Write assembly language program for 8085 to generate a square wave frequency 2KHz using 8253. Assume 8253 clock frequency is 1 MHz
10 M
4 (b)
Explain addressing modes of ARM processor
10 M
5 (a)
Interface 8255 to 8085 using I/O mapped I/O technique. Write assembly language program to initialize 8255 as PORT A-input port, PORT B-output port in mode 1
10 M
5 (b)
Calculate the time delay produced by the following subroutine. Assume crystal frequency of 8085 as 6 MHz
PUSH PSW
PUSH B
LXI B, FFFDH
UP : DCX B
MOV A,C
ORA B
JNZ UP
POP B
POP PSW
RET
PUSH PSW
PUSH B
LXI B, FFFDH
UP : DCX B
MOV A,C
ORA B
JNZ UP
POP B
POP PSW
RET
10 M
6 (a)
Write assembly language program to generate a rectangular waveform of frequency 1 KHz and 70% duty cycle at pin P1.1 using 8051. Assume 8051 microcontroller is operating at frequency 12 MHz
10 M
6 (b)
Explain serial communication in 8055 system
10 M
Write short note on :-
7 (a)
Salient features of 89C51, 89C52, 89C2051, 89C2052
5 M
7 (b)
ADC 0808 interfacing with 8051 microcontroller
5 M
7 (c)
PORT 1 internal structure of 8051
5 M
7 (d)
Memory Acess instructions of ARM processor
5 M
More question papers from Microcontrollers and Applications