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Chapter 21 Memory Protection Unit (MPU)
MPC5606BK Microcontroller Reference Manual, Rev. 2
380
Freescale Semiconductor
21.5.2.2
MPU Error Address Register, Slave Port
n
(MPU_EAR
n
)
When the MPU detects an access error on slave port
n
, the 32-bit reference address is captured in this
read-only register and the corresponding bit in the MPU_CESR[SPERR] field set. Additional information
about the faulting access is captured in the corresponding MPU_EDR
n
register at the same time. Note this
register and the corresponding MPU_EDR
n
register contain the most recent access error; there are no
hardware interlocks with the MPU_CESR[SPERR] field as the error registers are always loaded upon the
occurrence of each protection violation.
VLD
Valid
This bit provides a global enable/disable for the MPU.
0 The MPU is disabled.
1 The MPU is enabled.
While the MPU is disabled, all accesses from all bus masters are allowed.
Table 21-3. SPERR implementation
SPERR bit
Corresponding port
SPERR[0]
Flash memory controller slave port
SPERR[1]
System RAM controller slave port
SPERR[2]
IPS peripheral bus slave port
Offsets: 0x010–0x020 (3 registers)
Access: Read
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
EADDR [31:16]
W
Reset
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
EADDR [15:0]
W
Reset
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Figure 21-3. MPU Error Address Register, Slave Port n (MPU_EARn)
Table 21-4. MPU_EAR
n
field descriptions
Field
Description
EADDR
Error Address
This field is the reference address from slave port n that generated the access error.
Table 21-2. MPU_CESR field descriptions (continued)
Field
Description
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