Datasheet

Chapter 16 Debug Module (DBGV1)
MC9S12E128 Data Sheet, Rev. 1.07
Freescale Semiconductor 499
16.4.2.5.8 Inside Range (A ≤ address ≤ B)
In the inside range trigger mode, if the match condition for A and B happen on the same bus cycle, both
the A and B flags in DBGSC are set and a trigger occurs. If a match condition on only A or only B occurs
no flags are set. If TRGSEL = 1, the inside range is accurate only to word boundaries. If TRGSEL = 0, an
aligned word access which straddles the range boundary will cause a trigger only if the aligned address is
within the range.
16.4.2.5.9 Outside Range (address < A or address > B)
In the outside range trigger mode, if the match condition for A or B is met, the corresponding flag in
DBGSC is set and a trigger occurs. If TRGSEL = 1, the outside range is accurate only to word boundaries.
If TRGSEL = 0, an aligned word access which straddles the range boundary will cause a trigger only if the
aligned address is outside the range.
16.4.2.5.10 Control Bit Priorities
The definitions of some of the control bits are incompatible with each other. Table 16-25 and the notes
associated with it summarize how these incompatibilities are managed:
• Read/write comparisons are not compatible with TRGSEL = 1. Therefore, RWAEN and RWBEN
are ignored.
• Event-only trigger modes are always considered a begin-type trigger. See Section 16.4.2.8.1,
“Storing with Begin-Trigger,” and Section 16.4.2.8.2, “Storing with End-Trigger.”
• Detail capture mode has priority over the event-only trigger/capture modes. Therefore, event-only
modes have no meaning in detail mode and their functions default to similar trigger modes.
Table 16-25. Resolution of Mode Conflicts
Mode
Normal / Loop1 Detail
Tag Force Tag Force
A only
A or B
A then B
Event-only B 1 1, 3 3
A then event-only B 2 4 4
A and B (full mode) 5 5
A and not B (full mode) 5 5
Inside range 6 6
Outside range 6 6
1 — Ignored — same as force
2 — Ignored for comparator B
3 — Reduces to effectively “B only”
4 — Works same as A then B
5 — Reduces to effectively “A only” — B not compared
6 — Only accurate to word boundaries