TMS320C6671_15 Datasheet, PDF (225/238 Pages) Texas Instruments – Fixed and Floating-Point Digital Signal Processor

TMS320C6671
Fixed and Floating-Point Digital Signal Processor
SPRS756E—March 2014
7.28.2 Trace
The C6671 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 Emulation and Trace
Headers Technical Reference Manual in ‘‘Related Documentation from Texas Instruments’’ on page 72.
7.28.2.1 Trace Electrical Data/Timing
Table 7-86 DSP Trace Switching Characteristics ⁽¹⁾
(see Figure 7-64)
No.
1 t_w(EMUnH)
1 t_w(EMUnH)90%
2 t_w(EMUnL)
2 t_w(EMUnL)10%
3 t_sko(EMUn)
t_{sldp_}(EMUn)
End of Table 7-86
Parameter
Pulse duration, EMUn high detected at 50% Voh
Pulse duration, EMUn high detected at 90% Voh
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
1 Over recommended operating conditions.
Min Max Unit
2.4
ns
1.5
ns
2.4
ns
1.5
ns
-1 1 ns
3.3
V/ns
Table 7-87 STM Trace Switching Characteristics ⁽¹⁾
(see Figure 7-64)
No.
1 t_w(EMUnH)
1 t_w(EMUnH)90%
2 t_w(EMUnL)
2 t_w(EMUnL)10%
3 t_sko(EMUn)
t_{sldp_}(EMUn)
End of Table 7-87
Parameter
Pulse duration, EMUn high detected at 50% Voh with 60/40 duty cycle
Pulse duration, EMUn high detected at 90% Voh
Pulse duration, EMUn low detected at 50% Voh with 60/40 duty cycle
Pulse duration, EMUn low detected at 10% Voh
Output skew time, time delay difference between EMUn pins configured as trace
Output slew rate EMUn
1 Over recommended operating conditions.
Figure 7-64 Trace Timing
EMUx
1
2
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.
Min Max Unit
4
ns
3.5
ns
4
ns
3.5
ns
-1 1 ns
3.3
V/ns
Copyright 2014 Texas Instruments Incorporated
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Peripheral Information and Electrical Specifications 225