TC1784
On-Chip System Buses and Bus Bridges
User´s Manual
4-41
V1.1, 2011-05
Buses, V1.9
4.6.4.3
SBCU Error Registers Descriptions
The capture of bus error conditions is enabled by setting SBCU_CON.DBG to 1. In case
of a bus error, information about the condition will then be stored in the SBCU error
capture registers. The SBCU error capture registers can then be examined by software
to determine the cause of the FPI Bus error.
If enabled and an FPI Bus error occurs, the SBCU_ECON register holds the captured
FPI Bus control information and an error count of the number of bus errors. The
SBCU_EADD register stores the captured FPI Bus address. The SBCU_EDAT register
stores the captured FPI Bus data.
If the capture of FPI Bus error conditions is disabled (SBCU_CON.DBG = 0), the SBCU
error capture registers remain untouched.
Note: The SBCU error capture registers store only the parameters of the first error. In
case of multiple bus errors, an error counter SBCU_ECON.ERRCNT shows the
number of bus errors since the first error occurred. An application reset clears this
bit field to zero, but the counter can be set to any value through software. This
counter is prevented from overflowing, so a value of 2
16
- 1 indicates that at least
this many errors have occurred, but there may have been more. After
SBCU_ECON has been read, the SBCU_ECON, SBCU_EADD and SBCU_EDAT
registers are re-enabled to trace FPI Bus error conditions.
SBCU_ECON
SBCU Error Control Capture Register(020
H
)
Reset Value: 0000 0000
H
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
OPC
TAG
RDN WRN SVM
ACK
ABT RDY
T
OUT
rwh
rwh
rwh rwh rwh
rwh
rwh rwh rwh
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
ERRCNT
rwh
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