A
B
C
t
PLH
t
PHL
1
2
3
TMS320C6474
www.ti.com
SPRS552F – OCTOBER 2008 – REVISED JULY 2010
7.20.2 Trace
The C6474 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 7-84. Timing Requirements for Trace
(see
Figure 7-45
)
NO.
PARAMETER
MIN
MAX
UNITS
1
t
w(EMUnH)
Pulse duration, EMUn high
3 - 0.6
(1)
ns
1
t
w(EMUnH)
90%
Pulse duration, EMUn high detected at 90% V
OH
1.5
ns
1a
t
w(TCKH)
Pulse width time TCK high
8
ns
1b
t
w(TCKL)
Pulse width time TCK low
8
ns
2
t
w(EMUnL)
Pulse duration, EMUn low
3 - 0.6
(1)
ns
2
t
w(EMUnL)
10%
Pulse duration, EMUn low detected at 10% V
OH
1.5
ns
3
t
sko(EMUn)
Output Skew time, time delay difference between EMU pins configured as
-500
500
ps
trace.
4
t
skp(EMUn)
Pulse Skew, magnitude of time difference between high-to-low (T
PHL
) and
600
(1)
ps
low-to-high (T
PLH
) propagation delays.
(1)
This parameter applies to the maximum trace export frequency operating in a 40/60 duty cycle.
Figure 7-45. Trace Timing
Copyright © 2008–2010, Texas Instruments Incorporated
Peripheral Information and Electrical Specifications
185
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