MCU APROM: RAM: Flash: Difference-EEWORLD

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APROM is the user program storage area. The code of the microcontroller program we write is placed here. APROM is, APROM is a part of Flash.

RAM, random access memory, is mainly used to store dynamic data. For example, the variables defined in our program are placed here, and the intermediate results generated during program calculations are also placed here.

Flash, in general, is divided into two parts, one is LDROM, that is, the program boot area. How does a brand new microcontroller communicate with the computer when burning the program? The reason is that the program is solidified in the LDROM before the microcontroller leaves the factory. In this way, we can download the program to the brand new microcontroller. Otherwise, we can only use a professional programmer to download it. The program in the LDROM cannot be read by the user, nor can it be modified or deleted.

The other part is APROM, LDROM boots the computer and downloads the user's program into APROM.

In fact, there is another part, which is DATAROM, but not all microcontrollers have this part. This DATAROM is what we often call the EEPROM integrated inside the microcontroller, but its essence is not a real EEPROM, but the function is very similar.

LDROM is used to load ISP firmware or BOOTLOADER firmware, and APROM is used to load user code files. As you can see from the names, LDROM------LOAD ROM; APROM----APPLICATION ROM

Keywords：MCU APROM RAM Flash Reference address：MCU APROM: RAM: Flash: Difference

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