$4)$Types of memory used in microcontrollers $($RAM$,$ ROM, FlashROM, EEROM$)$are described below:$1.$ RAM $($Random Access Memory$)$: This type of memory is used for temporary storage of data and instructions that are currently in use. RAM is volatile memory, meaning it is cleared when the power is turned off. It is used to store temporary data such as variables, pointers, and stack. RAM is fast and allows the microcontroller to quickly access and manipulate data$\mathrm{.}2.$ ROM $($Read$-$Only Memory$)$: This type of memory is used to store permanent instructions and data that do not need to be changed. ROM is non$-$volatile memory, meaning it retains its contents even when the power is turned off. It is used to store the instructions for the microcontroller to execute, such as the bootloader, firmware, and other system software$\mathrm{.}3.$ FlashROM: This type of memory is similar to ROM, but it can be reprogrammed without being removed from the microcontroller. Flash memory is non$-$volatile, meaning it retains its contents even when the power is turned off. It is used to store the instructions for the microcontroller to execute and also allows the firmware to be updated without having to remove the microcontroller from the system.