MPC564EVB Freescale Semiconductor, MPC564EVB Datasheet - Page 423

• Manufacturer Part Number: MPC564EVB
• Description: KIT EVAL FOR MPC561/562/563/564
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC564EVB

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC56x
• Data Bus Width: 32 bit
• Interface Type: RS-232, Ethernet
• For Use With/related Products: MPC561, 562, 563, 564
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

With dual mapping, aliasing of address spaces may occur. This happens when the region is dual-mapped
into a region which is also mapped into one of the four regions available in the memory controller. If code
or data is written to the dual-mapped region, care must be taken to avoid overwriting this code or data by
normal accesses of the chip-select region.
There is a match if:
Care must also be taken to avoid overwriting “normal” CSx data with dual-mapped code or data.
One way to avoid this situation is by disabling the chip-select region and enabling only the dual-mapped
region (DMBR[DME] = 1, but BRx[V] = 0).
Freescale Semiconductor
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The attributes for the access are taken from one of the base and option registers of the appropriate
chip select
The chip-select region selected is determined by the CS line select bit field
“Dual-Mapping Base Register
where BA represents the bit field in the DMBR register.
bus_address[0:16] == {0000000,ISB[0:2],0,BA[1:6]}
MPC561/MPC563 Reference Manual, Rev. 1.2
(DMBR)”).
Figure 10-19
illustrates the phenomenon.
(Section 10.9.5,
Memory Controller
Eqn. 10-1
Eqn. 10-2
10-25