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MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
13-22
Freescale Semiconductor
13.3.2.9
Flash Bus Interface Unit Access Protection Register (FLASH_BIUAPR)
The FLASH_BIUAPR controls access protection for the flash from masters on the crossbar switch. This
register should only be written in a 32-bit write operation.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
W
Reset
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Reg Addr
Base (0xC3F8_8000) + 0x0020
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
1
1
1
1
1
1
M4AP
M3AP
M2AP
M1AP
M0AP
W
Reset
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Reg Addr
Base (0xC3F8_8000) + 0x0020
Figure 13-13. Flash Bus Interface Unit Access Protection
Register (FLASH_BIUAPR)
Table 13-16. FLASH_BIUAPR Field Descriptions
Bits
Name
Description
0–31
MnAP
[0:1]
Master n access protection. Controls whether read and write accesses to the flash are
allowed based on the master ID of a requesting master. These fields are initialized by
hardware reset. Refer to
.
00 No accesses may be performed by this master
01 Only read accesses may be performed by this master
10 Only write accesses may be performed by this master
11 Both read and write accesses may be performed by this master
These fields are identified as follows:
M0AP= e200z6 core
M1AP= Nexus
M2AP= eDMA
M3AP= EBI
M4AP = FEC (implemented in the MPC5553 only)
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