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E192048 Pages:2

Explain with neat functional block diagram the operation in 8255 PPI
List out the challenges in Embedded Systems.
PART 0

Answer any twofull questions, each carries 10 marks.
Explain with neat diagram the Register organisation and SFR in 8051.
Write an 8051 C program to toggle all the bits of PO & P2 continuously with a
250ms delay.
Write an ALP in 8051 to generate a square wave of 50% duty cycle on the P1.5
bit. Use Timer 0 to generate the time delay.
Explain the following instructions in 8051.
600310۷ A, @Ro(ii) 11108 TFo, again

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