Question $3$

GPTM Timer $-$ Input Capture

Answer $3$a $-3$e using the following information.

Suppose Timer $2$A is configured for $16-$bit, count$-$down, edge$-$time, capture mode and uses the $16$ MHz system clock.

Below is a graph of the timer operation as it repeatedly counts down from the maximum count value.

Let F $=$ count value $0$xCCC$6,$ G $=$ count value $0$x$7$FFD$,$ and H $=$ count value $0$x$5$FFB$.$

timer$-$graph.png

Question $3$a

Which line of code will configure the timer $($Timer $2$A$)$ to capture falling edge events on the input?

TIMER$2\_$CTL$\_$R &$=$ ~$0$xC$00$;

TIMER$2\_$CTL$\_$R &$=$ ~$0$xC;

TIMER$2\_$CTL$\_$R $|=0$x$800$;

TIMER$2\_$CTL$\_$R $|=0$x$8$;

TIMER$2\_$CTL$\_$R $|=0$xC;

TIMER$2\_$CTL$\_$R $=0$x$1$;

TIMER$2\_$CTL$\_$R $|=0$x$400$;

TIMER$2\_$CTL$\_$R $|=0$xC$00$;

TIMER$2\_$CTL$\_$R $|=0$x$4$;