What does the next instructions?

LDR RO$,$ GPIO$\_$PORTA$\_$DEN$\_$R

MOV R$1,$ OxF$0$

STR R $1,[R0]$

This procedure enables the digital pins $7,6,5$ and $4$ of port A$.$

This procedure enables the digital pins $3,2,1,$ and $0$ of port A

This procedure disables the digital pins $7,6,5$ and $4$ of port $A.$

This procedure enables the Port A as input