RM48L952:Questions About Stack Memory Behavior and Address Allocation

Tool/software:

Hello,

I am currently trying to understand how the Stack Pointer Register operates.

I have reviewed the Datasheet and Technical Reference Manual but could not find a detailed explanation of how the Stack Memory works. Is there a specific document that provides detailed information about Stack Memory operation?

Here is what I have deduced so far:

1. The basic unit of stack memory is 8 bytes.
2. The memory allocated for storing the return address is 8 bytes.
3. However, actual data (payload) is stored in 4-byte units.
4. If the size of a parameter or an argument is less than or equal to 4 bytes when divided by 8 bytes, it is stored in the remaining space of the memory allocated for the return address.

The above points are based on my assumptions, and I am having difficulty understanding the following:

• Why the value 0x00000001 is stored at address 0x08000FA8
• Why the value 0x00000005 is stored at address 0x08000FF8

I would greatly appreciate it if you could provide clarification on these points. Thank you!