TMS320C6678
Multicore Fixed and Floating-Point Digital Signal Processor
SPRS691D—April 2013
www.ti.com
7.27.2 Trace
The C6678 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 in ‘‘Related Documentation from Texas Instruments’’ on page 73.
7.27.2.1 Trace Electrical Data/Timing
(1)
Table 7-88
(see Figure 7-61)
DSP Trace Switching Characteristics
No.
Parameter
Pulse duration, EMUn high detected at 50% Voh
tw(EMUnH)90% Pulse duration, EMUn high detected at 90% Voh
Min Max Unit
1
1
2
2
3
tw(EMUnH)
2.4
1.5
2.4
1.5
-1
ns
ns
tw(EMUnL)
Pulse duration, EMUn low detected at 50% Voh
Pulse duration, EMUn low detected at 10% Voh
Output skew time, time delay difference between EMUn pins configured as trace
Output slew rate EMUn
ns
tw(EMUnL)10%
tsko(EMUn)
ns
1
ns
t
sldp_(EMUn)
3.3
V/ns
End of Table 7-88
1 Over recommended operating conditions.
(1)
Table 7-89
(see Figure 7-61)
STM Trace Switching Characteristics
No.
Parameter
Min Max Unit
1
1
2
2
3
tw(EMUnH)
Pulse duration, EMUn high detected at 50% Voh with 60/40 duty cycle
Pulse duration, EMUn high detected at 90% Voh
4
3.5
4
ns
ns
tw(EMUnH)90%
tw(EMUnL)
Pulse duration, EMUn low detected at 50% Voh with 60/40 duty cycle
Pulse duration, EMUn low detected at 10% Voh
ns
tw(EMUnL)10%
tsko(EMUn)
3.5
-1
ns
Output skew time, time delay difference between EMUn pins configured as trace
Output slew rate EMUn
1
ns
t
sldp_(EMUn)
3.3
V/ns
End of Table 7-89
1 Over recommended operating conditions.
Figure 7-61
Trace Timing
1
2
EMUx
3
EMUy
3
EMUz
EMUx represents the EMU output pin configured as the trace clock output.
EMUy and EMUz represent all of the trace output data pins.
230
Peripheral Information and Electrical Specifications
Copyright 2013 Texas Instruments Incorporated
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