8TH SEM. B.E. ELECTRONICS(NEW COURSE)
SUMMER 2006
ADVANCED MICROPROCESSOR & MICROCONTROLLERS (NEW)
SECTION – A
1) (a) Design memory system for 8086 using following memory chips.
i) 2k *8 EPROM – 4 No.
ii) 4k * 4 R/w M – 8 No. (5)
(b) Explain in brief addressing ways in 8086 to access data stored in memory. (5)
2) (a) Write 8086 ALP to add two BCD numbers in their ASCII form directly. Store the result as BCD only. The BCD numbers are stored in memory in their ASCII hex form, starting at 10000H. Store result in memory. (7)
(b) Explain in brief role of BIU, EU and queue in 8086 working. (6)
3) (a) Explain in brief cascade connection of 8259 PIC’s. Also discuss necessary command words for initialization of PIC’s. (8)
(b) Explain in brief.
i) Polled mode of 8259 PIC
ii) Default IR 7 routine. (5)
4) (a) Show 8086-8253 PIT interfacing in peripheral mapped I/O with control register address of 8253 as FF06H. Use this interface for designing autotimer of 1 minute. Assume clock of microprocessor system as 5Mhz. Assume suitable data. (10)
(b) Explain function of following 8051 pins
i. SYNDET/BD
ii. Rx Rdy
(5) (a) Design 8279 KBDC – 8086 interface to connect upto 32 keys and four seven segment displays. Write intialisation instructions to intialise 8279 also. (8)
(b) Show interfacing of ADC 0808 with 8086 Use i/o ports of 8255 for establishing link between 8086 and ADC. (5)
(6) (a) Explain the different data types of 8087 giving one example of each. (6)
(b) Write 8087 ALP to find
Y =pr2
Where r is radius in memory location named RADIUS in short real format. Store value of y in memory named RESULT. (7)
(7) (a) Explain in brief paging mechanism in 80386. (6)
(b) Discuss the features of 8237 DMA controller giving black schematic. (7)
(8) (a) Explain in brief architectural details of 8051 microcontroller. (6)
(b) Write 8051 ALP to add two 8 bit numbers stored in memory locations stating at 40H. Store the result in memory at the end. (7)
(9) (a) Give the structure of 8051 flag register. Explain in brief role of each bit. (6)
(b) Explain in brief the internal and external memory system of 8051 microcontroller. (7)
10. Write short notes on any two related to 8051
a) Interrupt facility
b) Counter/timers
c) Serial communication facility (14)