MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 309
![no-image](/images/manufacturer_photos/0/2/262/freescale_semiconductor_sml.jpg)
MPC8544COMEDEV
Manufacturer Part Number
MPC8544COMEDEV
Description
KIT DEV EXPRESS MPC8544COM
Manufacturer
Freescale Semiconductor
Type
MPUr
Datasheets
1.MPC8544VTALF.pdf
(117 pages)
2.MPC8544VTALF.pdf
(2 pages)
3.MPC8544VTALF.pdf
(1340 pages)
Specifications of MPC8544COMEDEV
Contents
Board
For Use With/related Products
MPC8544
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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7.9.6
The L2 cache supports error checking and correcting (ECC) for the data path between the core master and
system memory. It detects all double-bit errors, detects all multi-bit errors within a nibble, and corrects all
single-bit errors. Other errors may be detected, but are not guaranteed to be corrected or detected.
Multiple-bit errors are always reported when error reporting is enabled. When a single-bit error occurs, the
single-bit error counter register is incremented, and its value compared to the single-bit error trigger register.
An error is reported when these values are equal. The single-bit error registers can be programmed such that
minor memory faults are corrected and ignored, but double- or multi-bit errors generate an interrupt.
The syndrome encodings for the ECC code are shown in
Freescale Semiconductor
Read
Read atomic
RWNITC
Kill
RWITM
RWITM atomic
RClaim
Transaction Type
Data
Bit
0
1
2
3
4
5
6
7
8
Error Checking and Correcting (ECC)
Table 7-28. State Transitions Due to System-Initiated Transactions (continued)
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
0
•
•
•
•
•
•
•
•
•
1
•
•
•
wt
1
x
1
0
x
x
x
2
•
•
Syndrome Bit
ci
1
0
1
1
0
1
0
Table 7-29. L2 Cache ECC Syndrome Encoding
3
•
•
gbl
0
0
0
0
0
0
0
4
•
•
5
•
•
•
•
Initial L2
I/E/EL/T
State
EL/T
N/A
N/A
I//T
I/T
EL
EL
EL
I/E
E
E
T
6
I
•
7
•
•
•
•
Final L2
Same
Same
Same
Same
State
N/A
N/A
EL
EL
E
E
E
T
I
I
Table 7-29
Data
Bit
32
33
34
35
36
37
38
39
40
No L1/L2 effect
Read-and-clear-lock
No L1/L2 effect
Invalidate data, keep lock
0
•
•
and
1
•
•
Table
2
•
•
•
•
•
•
•
•
•
Syndrome Bit
Comments
7-30.
3
•
•
•
L2 Look-Aside Cache/SRAM
4
•
•
•
•
•
•
5
•
•
•
•
6
•
7
•
•
•
•
7-39
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