Microprocessors and Microcontollers - 1 (MPMC) Semester 5 (3 Hours) December 2013

Microprocessors and Microcontollers - 1 (MPMC) Semester 5 (3 Hours) December 2013
LJ-11312 [Total Marks : 100]
N.B. :	(1)	Question No. 1 is compulsory.
	(2)	Solve any four questions out of remaining six questions.
1.	(a)	Explain T states, Machine cycles and instruction cycles and instruction cycles.	05
	(b)	Why address and data bus are multiplexed? Explain how they demultiplexed in 8085.	05
	(c)	Differentiate SJMP, AJMP, and LJMP instructions of 8051.	05
	(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.	05
2.	(a)	Explain interrupt structure of 8085.	10
	(b)	Explain internal memory organization of 8051 microcontroller.	10
3.	(a)	Draw and explain timing diagram for instruction INR M.	10
	(b)	Draw and explain the architecture of ARM processor.	10
4.	(a)	Explain the control word register format of 8253. Write assembly language program for 8085 to generate a square wave of frequency 2 KHz using 8253. Assume 8253 clock frequency is 1 MHz.	10
	(b)	Explain addressing modes of ARM processor.	10
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
	(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   MOVA,C   ORAB   JNZ UP   POP B   POP PSW   RET	10
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
	(b)	Explain serial communication in 8085 system.	10
7.	Write short note on :-		20
	(a)	Salient features of 89C51, 89C52, 89C2051 and 89C2052.
	(b)	ADC 0808 interfacing with 8051 microcontroller.
	(c)	PORT 1 internal structure of 8051
	(d)	Memory Access instructions of ARM processor.