Complete Q1) a,b,c,d & e.

Semestral Exam/EG2953/Page 2 Question 1( 25 marks ) 8051 74LS47 Unit Digit 74LS47 Tens Digit Figure Q1 Figure Q1 shows the 8051 microcontroller is connected to two 7-segment displays via BCD to 7-segment display decoders. Answer the following questions: (a) What is the data in PO in order to display 2 and 6 in the tens and unit digit respectively? ( 2 marks) (b) If the number 128 is stored in PO, what will be the number shown at the tens and unit digit 7-segment display? ( 2 marks) (c) The program shown below is executed by the 8051 microcontroller. Analyse the program displays. void main) unsigned int 1.j.x.y. while(1) x1/10 5 marks) 10 marks) 6 marks) (d) Write a C program to count from 99 to 01 repeatedly. (e) Without changing the circuit function, redraw the circuit in Figure Q1 using ony PO and P1 to connect to tens and unit digit of the 7-segment display