Q$1-$A$)$ Regarding the Atmega$32$ ADC system, if the $V_{\text{r}\text{e}\text{f}}=5V$ and the digital output value $=11AH,$ then calculate $($step by step$)$ the analog input signal.

$[7$ marks$]$

Q$1-$B$)$ Fill in the blank for each of the following:

$[16$ Marks$]$

i$.$ When an interrupt occurs, the following events will happen:

a$)$ The address of the next instruction of the main program is pushed on

b$)$ Further interrupts are

c$)$ The begins executing.

d$)$ When return from the interrupt, then

ii$.$ To enable or disable all interrupts, we need to set or clear the "iit in register

iii. The Atmega$32$ microcontroller has

ADC channels, and each ADC

channel is of bit size.

Q$2)$ The following AVR assembly code represents a solution for an algebraic expression, what is this expression?

$\backslash$table$[[$DSEG$],[$ORG OX$60],[$A: :BYTE $1],[$B: BYTE $1],[$C: BYTE $2],[$CSEG$],[$LDS R$16,$A$],[$LDS R$17,$B$],[$LDI R$18,50],[$MUL R$16,$R$16],[$LDI R$20,0],[$SUB R$0,$R$17],[$SBC R$1,$R$20],[$MOV $21,R0$