mc9s08ac32 Freescale Semiconductor, Inc, mc9s08ac32 Datasheet - Page 301

• Manufacturer Part Number: mc9s08ac32
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

16.4.3.8
This register can be read any time, but may be written only if ARM = 0, except bits 4 and 5 are hard-wired
to 0s.
Freescale Semiconductor
Reset
TRG[3:0]
TRGSEL
BEGIN
Field
3:0
W
7
6
R
TRGSEL
Trigger Type — Controls whether the match outputs from comparators A and B are qualified with the opcode
tracking logic in the debug module. If TRGSEL is set, a match signal from comparator A or B must propagate
through the opcode tracking logic and a trigger event is only signalled to the FIFO logic if the opcode at the match
address is actually executed.
0 Trigger on access to compare address (force)
1 Trigger if opcode at compare address is executed (tag)
Begin/End Trigger Select — Controls whether the FIFO starts filling at a trigger or fills in a circular manner until
a trigger ends the capture of information. In event-only trigger modes, this bit is ignored and all debug runs are
assumed to be begin traces.
0 Data stored in FIFO until trigger (end trace)
1 Trigger initiates data storage (begin trace)
Select Trigger Mode — Selects one of nine triggering modes, as described below.
0000 A-only
0001 A OR B
0010 A Then B
0011 Event-only B (store data)
0100 A then event-only B (store data)
0101 A AND B data (full mode)
0110 A AND NOT B data (full mode)
0111 Inside range: A ≤ address ≤ B
1000 Outside range: address < A or address > B
1001 – 1111 (No trigger)
0
7
Debug Trigger Register (DBGT)
= Unimplemented or Reserved
BEGIN
0
6
Table 16-5. DBGT Register Field Descriptions
Figure 16-8. Debug Trigger Register (DBGT)
MC9S08AC60 Series Data Sheet, Rev. 2
0
0
5
0
0
4
Description
TRG3
0
3
TRG2
0
2
Chapter 16 Development Support
TRG1
1
0
TRG0
0
0
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