Chapter 6 S12Z Debug (S12ZDBGV2) Module
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
195
6.3.2.11
Debug Status Register (DBGSR)
Read: Anytime.
Write: Never.
4
EEVF
External Event Flag
— Indicates the occurrence of an external event during the debug session.
0 No external event
1 External event
3–0
ME[3:0]
Match Event[3:0]
— Indicates a comparator match event on the corresponding comparator channel
.
Address: 0x010B
7
6
5
4
3
2
1
0
R
TBF
0
0
PTACT
0
SSF2
SSF1
SSF0
W
Reset
POR
—
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 6-13. Debug Status Register (DBGSR)
Table 6-23. DBGSR Field Descriptions
Field
Description
7
TBF
Trace Buffer Full
— The TBF bit indicates that the trace buffer has been filled with data since it was last armed.
If this bit is set, then all trace buffer lines contain valid data, regardless of the value of DBGCNT bits CNT[6:0].
The TBF bit is cleared when ARM in DBGC1 is written to a one. The TBF is cleared by the power on reset
initialization. Other system generated resets have no affect on this bit
4
PTACT
Profiling Transmission Active
— The PTACT bit, when set, indicates that the profiling transmission is still
active. When clear, PTACT then profiling transmission is not active. The PTACT bit is set when profiling begins
with the first PTS format entry to the trace buffer. The PTACT bit is cleared when the profiling transmission ends.
2–0
SSF[2:0]
State Sequencer Flag Bits
— The SSF bits indicate the current State Sequencer state. During a debug session
on each transition to a new state these bits are updated. If the debug session is ended by software clearing the
ARM bit, then these bits retain their value to reflect the last state of the state sequencer before disarming. If a
debug session is ended by an internal event, then the state sequencer returns to State0 and these bits are
cleared to indicate that State0 was entered during the session. On arming the module the state sequencer enters
State1 and these bits are forced to SSF[2:0] = 001. See
.
Table 6-24. SSF[2:0] — State Sequence Flag Bit Encoding
SSF[2:0]
Current State
000
State0 (disarmed)
001
State1
010
State2
011
State3
100
Final State
Table 6-22. DBGEFR Field Descriptions
Field
Description
Содержание MC9S12ZVHL32
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Страница 788: ...Appendix A MCU Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 788 Freescale Semiconductor...
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