ADV
ANCEINFORMA
TION
GPIO
t
f(GPO)
t
r(GPO)
TMS
TDI
TDO
PD
RTCK
TCK
EMU0
TRST
TDIS
GND
KEY
GND
GND
EMU1
GND
GND
TCK
TDO
TDI
TMS
TRST
RESET
EMU2
EMU4
EMU3
GND
GND
open
drain
A low pulse from the emulator
can be tied with other reset
sources to reset the board.
1
2
3
4
5
6
7
8
9
10
11
12
14
13
16
15
18
17
20
19
3.3 V
3.3 V
3.3V
100
W
2.2 k
W
4.7 k
W
4.7 k
W
GND
GND
MCU
Distance between the header and the target
should be less than 6 inches (15.24 cm).
TMS320F28377S, TMS320F28376S, TMS320F28375S, TMS320F28374S
SPRS881A – AUGUST 2014 – REVISED JUNE 2015
Figure 5-8. Connecting to the 20-Pin JTAG Header
5.7.6
GPIO Electrical Data and Timing
5.7.6.1
GPIO - Output Timing
Table 5-22. General-Purpose Output Switching Characteristics
over recommended operating conditions (unless otherwise noted)
PARAMETER
MIN
MAX
UNIT
t
r(GPO)
Rise time, GPIO switching low to high
All GPIOs
8
ns
t
f(GPO)
Fall time, GPIO switching high to low
All GPIOs
8
ns
t
fGPO
Toggling frequency, GPO pins
25
MHz
Figure 5-9. General-Purpose Output Timing
Copyright © 2014–2015, Texas Instruments Incorporated
Specifications
69
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