Arm Memory Structure Note

Observe the .lst file (generated by ARM compiler) to get the following conclustion.

ARM memory map is consists of:

1. .Code
2. .RO
3. .RW
4. .ZI

.Code = Code + inline Data

.RO = Constant Data

.RW = Local Variable

.ZI = Global Variable (Include Static Variable)

Add any code that may possibly increase RAM or ROM size.

ROM size = .Code + .RO + .RW 

RAM size = .RW + .ZI

The actual ARM outputted binary size is ROM size

<NOTE>
What makes .RW so special is because .RW data stays in the ROM but during initializing, it will be copied to RAM