Motorola MPC823e Reference Manual page 355

Endian Modes
The hardware operations that are used to support the different endian modes are:
• Address munging in the core is controlled by the MSR
Microprocessor Family: The Programming Environments for 32-Bit Microprocessors
manual for more information.
• The MPC823e internal bus signal is driven by the master that informs the system
interface unit to swap and perform address demunging or leave the current access as
it is. Table 10-1 defines the DC_CSR
• Address munging and data bytes format in the communication processor module
(CPM) that is controlled by the BO field of the function code register.
COMMUNICATION
PROCESSOR
MODULE
U-BUS
CORE
INTERNAL
MEMORY
MPC823e
Figure 14-1. General MPC823e System Diagram
Note: Some peripheral component interconnect (PCI) bridge devices cannot be used
in little-endian mode.
14-2
bit for core and cache accesses.
LES
SYSTEM
INTERFACE
UNIT
I / O DEVICES
MPC823e REFERENCE MANUAL
bit. Refer to the PowerPC
LE
SYSTEM
MEMORY
E-BUS
PCI INTERFACE
PCI DEVICES
MOTOROLA