Information

System Configuration
MPC8308 PowerQUICC II Pro Processor Reference Manual, Rev. 1
5-2 Freescale Semiconductor
Figure 5-1 shows an example memory map.
Figure 5-1. Local Memory Map Example
Table 5-2 shows an example of local access window settings.
In this example, the local access window of the boot ROM is defined as window number 1, on a local bus
device, in the highest 8 Mbytes of memory as set by the reset configuration word high during the reset
sequence (see Section 4.3.2.2.3, “Boot ROM Location”) and Section 5.1.4.3.1,
“LBLAWBAR0[BASE_ADDR] Reset Value.” The local access window, which describes the range of
memory used for memory-mapped registers (IMMR), is a fixed 1-Mbyte space pointed to by the
IMMRBAR register using its default value (0xFF40_0000). See Section 5.1.4.1, “Internal Memory Map
Registers Base Address Register (IMMRBAR).”
Table 5-2. Local Access Windows Example
Window Base Address Size Target Interface
5 0x0000_0000 2 Gbytes DDR2 SDRAM
2 0x8000_0000 1 Mbyte Local bus
7 0x8100_0000 1 Mbyte PCI Express
3 0xC000_0000 256 Mbytes Local bus
0 0xFF40_0000 1 Mbyte Configuration registers (IMMR)
1 0xFF80_0000 8 Mbytes Local bus boot ROM Flash
6,4 Unused
Example Local Memory Map
0
0xFFFF_FFFF
0xA000_0000
Memory
I/O
IMMR
Boot ROM
0x8000_0000
Local Bus SRAM
DDR2 SDRAM
Local Bus Flash
Configuration Registers