TMS320DM8148 Datasheet, PDF (213/343 Pages) Texas Instruments – TMS320DM814x DaVinci™ Digital Media Processors

TMS320DM8148, TMS320DM8147
www.ti.com
SPRS647 – MARCH 2011
Table 8-11. Switching Characteristics Over Recommended Operating Conditions for STM Trace
(see Figure 8-8)
NO.
PARAMETER
OPP100
UNIT
MIN
MAX
1
t_w(EMUH50)
t_w(EMUH90)
2
t_w(EMUL50)
t_w(EMUL10)
3 t_sko(EMU)
Pulse duration, EMUx high detected at 50% V_OH with 60/40 duty
cycle
Pulse duration, EMUx high detected at 90% V_OH
Pulse duration, EMUx low detected at 50% V_OH with 60/40 duty
cycle
Pulse duration, EMUx low detected at 10% V_OH
Output skew time, time delay difference between EMUx pins
configured as trace.
TBD ⁽¹⁾
TBD
TBD ⁽¹⁾
TBD
TBD
ns
ns
ns
ns
TBD ps
t_skp(EMU)
t_{sldp_o(EMU)}
Pulse skew, magnitude of difference between high-to-low (t_PHL)
and low-to-high (t_PLH) propagation delays
Output slew rate EMUx
TBD
TBD⁽¹⁾ ns
V/ns
(1) This parameter applies to the maximum trace export frequency operating in a 40/60 duty cycle.
Buffer
Inputs
Buffers
EMUx Pins
B
A
C
A
t_PLH
B
t_PHL
1
2
3
C
Figure 8-8. STM Trace Timing
Copyright © 2011, Texas Instruments Incorporated
Peripheral Information and Timings 213
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