TMS320TCI6487
TMS320TCI6488
Communications Infrastructure Digital Signal Processor
SPRS358F–APRIL 2007–REVISED AUGUST 2008
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8.19.2 Trace
The TCI6487/8 device supports Trace. Trace is a debug technology that provides a detailed, historical
account of application code execution, timing, and data accesses. Trace collects, compresses, and
exports debug information for analysis. Trace works in real-time and does not impact the execution of the
system.
For more information on board design guidelines for Trace Advanced Emulation, see the 60-Pin Emulation
Header Technical Reference (literature number SPRU655).
Table 8-73. Timing Requirements for Trace
(see Figure 8-41)
NO.
1
PARAMETER
Pulse duration, EMUn high
tw(EMUnH) 90% Pulse duration, EMUn high detected at 90% VOH
MIN
3 - 0.6(1)
1.5
MAX UNITS
tw(EMUnH)
ns
ns
ns
ns
ns
ns
1
1a
1b
2
tw(TCKH)
tw(TCKL)
tw(EMUnL)
Pulse width time TCK high
Pulse width time TCK low
Pulse duration, EMUn low
8
8
3 - 0.6(1)
2
tw(EMUnL) 10% Pulse duration, EMUn low detected at 10% VOH
1.5
3
tsko(EMUn) Output Skew time, time delay difference between EMU pins configured as
-500
500
ps
trace.
4
tskp(EMUn)
Pulse Skew, magnitude of time difference between high-to-low (TPHL) and
low-to-high (TPLH) propagation delays.
600(1)
ps
(1) This parameter applies to the maximum trace export frequency operating in a 40/60 duty cycle.
A
tPHL
tPLH
1
2
B
C
3
Figure 8-41. Trace Timing
178
Peripheral Information and Electrical Specifications
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