mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 352
mpc823rg
Manufacturer Part Number
mpc823rg
Description
Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MPC823RG.pdf
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SECTION 14
ENDIAN MODES
This section will discuss how the MPC823 supports three system endian configurations:
A general description of the different endian modes can be found in The PowerPC
Microprocessor Family: The Programming Environments (MPCFPE/AD) manual that is
available from Motorola. Throughout the MPC823 Reference Manual , the term system
refers to the devices that reside on the MPC823 bus. The MPC823 core operates in the big-
endian mode of a big-endian system and in the PowerPC little-endian mode of two other
configurations.
Table 14-2 contains possible programming configurations.
• Little-endian system
• Big-endian system
• PowerPC
PowerPC Little-Endian Mode
Table 14-2. Endian Mode Programming For Core Data Structures
Little-Endian Mode
™
Big-Endian Mode
Table 14-1. Little-Endian Effective Address Modification
little-endian system
Reserved
MODE
NOTE:
DATA LENGTH (BYTES)
Freescale Semiconductor, Inc.
For More Information On This Product,
There are no 8-byte scalars in the MPC823.
For Individual Aligned Scalar
MPC823 REFERENCE MANUAL
1
2
4
8
Go to: www.freescale.com
MSR
LE
(AND MSR
ADDRESS MODIFICATION
0
0
1
1
XOR with 0b111
XOR with 0b110
XOR with 0b100
(No Change)
ILE
)
DC_CSR
0
1
0
1
LES
14-1
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