mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 168
mcf5282
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mcf5282
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Freescale Semiconductor, Inc
Datasheet
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System Control Module (SCM)
At reset, these on-chip modules are configured to have only supervisor read/write access capabilities. Bit
encodings for the ACCESS_CTRL field in the GPACR are shown in
memory space protected by the GPACRs and the modules mapped to these spaces.
8-16
Bits
6–4
3–0 ACCESS_CTRL This 4-bit field defines the access control for the given memory region.
7
LOCK
Name
—
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Bits
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
This bit, once set, prevents subsequent writes to the GPACR. Any attempted write to the
GPACR generates an error termination and the contents of the register are not affected.
Only a system reset clears this flag.
Reserved, should be cleared.
The encodings for this field are shown in
Table 8-13. GPACR ACCESS_CTRL Bit Encodings
Read / Write
Read
Read
Read
Read / Write
Read / Write
Read / Write
No Access
Read / Write / Execute
Read / Execute
Read / Execute
Execute
Read / Write / Execute
Read / Write / Execute
Read / Write
Read / Write / Execute
Table 8-12. GPACR Field Descriptions
Supervisor Mode
Description
Table
No Access
No Access
Read
No Access
Read / Write
Read
Read / Write
No Access
No Access
No Access
Read / Execute
No Access
Read / Write / Execute
Read / Execute
Read
Execute
8-13.
User Mode
Table
8-13.
Table 8-14
Freescale Semiconductor
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