dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 333

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

Cases CCT1 and CCT2 directly use the first and second triggers of the Breakpoint Unit as Start and Stop
triggers. The remaining cases use the Breakpoint Unit to generate either the Start trigger (case CCT3) or
the Stop trigger (remaining cases). These remaining cases use any of the triggers supported in Table 11-9:
Note that the triggers above do not support the ability of triggering on the Nth occurrence because the
16-bit counter is now dedicated to counting operations, and no longer available for breakpoint triggering.
Freescale SemiconductorJTAG and Enhanced On-Chip Emulation (Enhanced OnCE)
Single Triggers
PAB-1 — F/R/W/A
XAB1 — R/W/A
ORed Triggers
PAB-1 — Fetch
PAB-1 — Access
PAB-2 — Fetch
ANDed Triggers
XAB1 — R/W/A
Sequenced Triggers
PAB-1 — Fetch
PAB-1 — Access
PAB-2 — Fetch
XAB1 — R/W/A
PAB-2 — Fetch
Generation of Two Triggers — Start and Stop
PAB-1 — Fetch
=> Start Capture Ctr
PAB-1 — Access
=> Start Capture Ctr
PAB-2 — Fetch
=> Start Capture Ctr
First Breakpoint
Table 11-9. First Part of Breakpoint Unit Trigger— 16-bit Counter in Capture Mode
Trigger
AND
==>
==>
==>
==>
==>
OR
OR
OR
Op
—
—
—
(none)
(none)
PAB-2 — Fetch
PAB-2 — Fetch
XAB1 — Access
CDB — Data Value
PAB-2 — Fetch
PAB-2 — Fetch
PAB-1 — Access
PAB-2 — Fetch
XAB1 — R/W/A
PAB-2 — Fetch
=> Stop Capture Ctr
PAB-2 — Fetch
=> Stop Capture Ctr
PAB-1 — Access
=> Stop Capture Ctr
Second Breakpoint
Trigger
1st F/R/W/A on PAB Bus, Trigger 1
1st R/W/A on XAB1 Bus, Trigger 1
1st Fetch on PAB Trig1 or 1st Fetch PAB Trig2
1st Access on PAB Trig1 or 1st Fetch PAB Trig2
1st F on PAB Trig2 or 1st Access XAB1 Trig1
1st R/W/A on XAB1 Trig1 and CDB Data Val Trig2
1st F on PAB Trig1 followed by 1st F PAB Trig2
1st A on PAB Trig1 followed by 1st F PAB Trig2
1st F on PAB Trig2 followed by 1st A PAB Trig1
1st R/W/A XAB1 Trig1 followed 1st F PAB Trig2
1st F PAB Trig2 followed 1st XAB1 R/W/A Trig2
Start Capture on 1st Fetch on PAB Trig 1 and Stop
Capture on 1st Fetch on PAB Trig2
Start Capture on 1st Access on PAB Trig 1 and
Stop Capture on 1st Fetch on PAB Trig2
Start Capture on 1st Fetch on PAB Trig 2 and Stop
Capture on 1st Access on PAB Trig1
Enhanced OnCE and the Processing States
Comments
11-21