dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 330

• Manufacturer Part Number: dsp56800e
• Description: 16-bit Digital Signal Controller Core
• Manufacturer: Freescale Semiconductor, Inc

JTAG and Enhanced On-Chip Emulation (Enhanced OnCE)
The final Breakpoint Unit trigger will then be one of the following:
This is true except for the cases where the Breakpoint Unit is used to generate both the Start and Stop
triggers.
11.4.4.2.2
Once a valid Breakpoint Unit Trigger has occurred, one of the following actions can be performed. Other
actions can be found in further sections which use “Breakpoint Unit Trigger” as a triggering condition.
The “Signal Watchpoint” action listed above refers to simply toggling the event terminal, one of the
terminals available as an output of the Enhanced OnCE module.
11-18
Table 11-4. First Part of Breakpoint Unit Trigger(s)— 16-bit Counter Available for Triggering
Generation of Two Triggers — Start and Stop
PAB-1 — Fetch
=> Start Trace Buffer
PAB-1 — Access
=> Start Trace Buffer
PAB-2 — Fetch
=> Start Trace Buffer
First Breakpoint
Case BK1
Case BK2
Case BK3
Case BK4
Case BK5
Trigger
Table 11-5. Breakpoint Unit Trigger — 16-bit Counter Available for Triggering
Case 1
Case 2
Breakpoint Unit Actions
Breakpoint Unit Trigger
(First Part of Breakpoint trigger) OR Enabled DEBUGEV OR Enabled Limiting
(First Part of Breakpoint trigger) => (Enabled DEBUGEV OR Enabled Limiting)
Op
—
—
—
Trigger for Action
Table 11-6. Possible Breakpoint Unit Actions
PAB-2 — Fetch
=> Stop Trace Buffer
PAB-2 — Fetch
=> Stop Trace Buffer
PAB-1 — Access
=> Stop Trace Buffer
DSP56800E Core Reference Manual
Second Breakpoint
Trigger
Breakpoint Unit Trigger
Enter Debug state
Generate Breakpoint Unit Interrupt Request
Start Trace Buffer Capture
Halt Trace Buffer Capture
Signal Watchpoint
Start Trace Buffer on 1st Fetch on PAB Trig1 and
Stop Trace on 1st Fetch on PAB Trigger 2
Start Trace Buffer on 1st Access on PAB Trig1
and Stop Trace on 1st Fetch on PAB Trigger 2
Start Trace Buffer on 1st Fetch on PAB Trig2 and
Stop Trace on 1st Access on PAB Trigger 1
Action Performed
Comments
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