Question $2(5$ points$)$

Observe the following assembly code. If the MCU crystal clock is $21\mathrm{.}63MHz,$ and the timer counting frequency is usually $\frac{1}{12}$ of the crystal clock, answer the following questions. Hint: the appendix has the instruction set and information about the registers.

Requirements:

Comment each line of code to explain its role to another developer

Showing your work, calculate the duty cycle, and frequency of the output signal on P$1\mathrm{.}0$

$\backslash$table$[[,$ORG O$0$h$],[$MAIN:$,$MOV TMOD, #$20$h$],[,$MOV TH$1,$ #$0],[,$SETB TR$1$ ;$],[$BACK:$,$JNB TF$1,$ BACK ;$],[$CPL P$1\mathrm{.}0,],[$CLR TF$1,],[,$SJMP BACK ;$],[,]]$

Answer