TC1796
System Units (Vol. 1 of 2)
On-Chip System Buses and Bus Bridges
User’s Manual 6-29 V2.0, 2007-07
Buses, V2.0
6.5.4.2 Signal Status Triggers
The signal status debug trigger event conditions are defined by the contents of the
xBCU_DBBOS and xBCU_DBCNTL registers. Depending on the selected configuration
a wide range of possibilities arise for the creation of a debug trigger event based on
FPI Bus status signals. Possible combinations are:
• Match on a single signal status
• Match on a multiple signal status
With the multiple signal match conditions, all single signal match conditions are
combined with a logical AND to the signal status debug trigger event signal. The
selection whether or not a single match condition is selected can be enabled/disabled
selectively for each condition via the xBCU_DBCNTL.ONBOSx bits.
Figure 6-10 Signal Status Trigger Generation
6.5.4.3 Grant Triggers
The signal status debug trigger event conditions are defined via the registers
xBCU_DBGRNT and xBCU_DBCNTL. Depending on the configuration of these
registers, any combination of FPI Bus master trigger events can be configured. Only the
enabled masters in the xBCU_DBGRNT register are of interest for the grant debug
trigger event condition. The grant debug trigger event condition can be enabled/disabled
via bit xBCU_DBCNTL.ONG (see Figure 6-11).
MCA05637
1
0
ON
BOS3
xBCU_DBCNTL
FPI Bus Signals
Signal
Status
Trigger
ON
BOS2
ON
BOS1
ON
BOS0
1
0
1
0
1
0
=
xBCU_DBBOS
OPCSVMWRRD
Equal
Compare
4
=
=
RD
WR
SVM
OPC
x = “S“ for SBCU
x = “R“ for RBCU
4
≥1
0
0
0
0
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