
Memory Map/Register Definition
MCF5271 Reference Manual, Rev. 2
Freescale Semiconductor
11-3
11.2.1 Register Descriptions
11.2.1.1 Internal Peripheral System Base Address Register (IPSBAR)
The IPSBAR specifies the base address for the 1 Gbyte memory space associated with the on-chip
peripherals. At reset, the base address is loaded with a default location of 0x4000_0000 and
marked as valid (IPSBAR[V]=1). If desired, the address space associated with the internal
modules can be moved by loading a different value into the IPSBAR at a later time.
If an address “hits” in overlapping memory regions, the following priority is used to determine
what memory is accessed:
1. IPSBAR
2. RAMBAR
3. Cache
4. SDRAM
5. Chip Selects
NOTE
This is the list of memory access priorities when viewed from the
processor core.
0x00_0030
GPACR
—
0x00_0034
—
0x00_0038
—
0x00_003C
—
Table 11-1. SCM Register Map (Continued)
IPSBAR
Offset
[31:24]
[23:16]
[15:8]
[7:0]