ian lovatt

52277 IPSBAR

Discussion created by ian lovatt on Dec 2, 2009
Latest reply on Feb 5, 2010 by ian lovatt

in MCF52277RM.pdf section 1.4 Memory Map Overview says IPS is at F000_0000h

 

yet the .lcf from an example project that came with the 52277EVB has the following:

 

# MCF52277 Derivative Memory map definitions from linker command files:
# __IPSBAR, __RAMBAR, __RAMBAR_SIZE, __FLASHBAR, __FLASHBAR_SIZE linker
# symbols must be defined in the linker command file.

# Memory Mapped Registers (IPSBAR= 0x40000000)
 ___IPSBAR         = 0x40000000;

 

4000_0000 is the same address as the external DDR. I'm not experiencing any problems so I think i've just misunderstood something .

 

Can anyone explain to me why IPSBAR and the external DDR seem to be mapped to the same address space?

 

thanks

ian

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