DM385, DM388
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SPRS821D –MARCH 2013–REVISED DECEMBER 2013
Table 8-10. Switching Characteristics Over Recommended Operating Conditions for STM Trace
(see Figure 8-8)
OPP100/OPP120/
Turbo/Nitro
NO.
PARAMETER
UNIT
MIN
4(1)
3.5
MAX
Pulse duration, EMUx high detected at 50% VOH with 60/40 duty
cycle
tw(EMUH50)
tw(EMUH90)
tw(EMUL50)
tw(EMUL10)
tsko(EMU)
ns
ns
ns
ns
ns
1
Pulse duration, EMUx high detected at 90% VOH
Pulse duration, EMUx low detected at 50% VOH with 60/40 duty
cycle
4(1)
3.5
2
3
Pulse duration, EMUx low detected at 10% VOH
Output skew time, time delay difference between EMUx pins
configured as trace.
-0.5
0.5
Pulse skew, magnitude of difference between high-to-low (tPHL
and low-to-high (tPLH) propagation delays
)
tskp(EMU)
0.6(1)
ns
tsldp_o(EMU)
Output slew rate EMUx
3.3
V/ns
(1) This parameter applies to the maximum trace export frequency operating in a 40/60 duty cycle.
A
Buffer
Inputs
Buffers
EMUx Pins
tPHL
tPLH
1
2
B
C
B
C
A
3
Figure 8-8. STM Trace Timing
Copyright © 2013, Texas Instruments Incorporated
Peripheral Information and Timings
171
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