Техническая Спецификация для Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X
Модели
DK-TM4C129X
32.14
Input/Output Pin Characteristics
Note:
All GPIO signals are 3.3-V tolerant, except for PB1 (
USB0VBUS
) which is 5-V tolerant. See
“Signal Description” on page 772 for more information on GPIO configuration.
Two types of pads are provided on the device:
■ Fast GPIO pads: These pads provide variable, programmable drive strength and optimized
voltage output levels.
■ Slow GPIO pads: These pads provide 2-mA drive strength and are designed to be sensitive to
voltage inputs. The following GPIOs port pins are designed with Slow GPIO Pads:
– PJ1
– PJ1
Note:
Port pins
PL6
and
PL7
operate as Fast GPIO pads, but have 4-mA drive capability only.
GPIO register controls for drive strength, slew rate and open drain have no effect on these
pins. The registers which have no effect are as follows: GPIODR2R, GPIODR4R,
GPIODR8R, GPIODR12R, GPIOSLR, and GPIOODR.
pins. The registers which have no effect are as follows: GPIODR2R, GPIODR4R,
GPIODR8R, GPIODR12R, GPIOSLR, and GPIOODR.
Note:
Port pins
PM[7:4]
operate as Fast GPIO pads but support only 2-, 4-, 6-, and 8-mA drive
capability. 10- and 12-mA drive are not supported. All standard GPIO register controls,
except for the GPIODR12R register, apply to these port pins.
except for the GPIODR12R register, apply to these port pins.
Table 32-34. Fast GPIO Module Characteristics
abcd
Unit
Max
Nom
Min
Parameter Name
Parameter
pF
50
-
-
Capacitive loading for measurements given in this
table
table
e
C
LGPIO
kΩ
20.2
16.0
12.1
Fast GPIO internal pull-up resistor
f
R
GPIOPU
kΩ
40
-
25
Fast GPIO
PL6
and
PL7
(4-mA only) pull-up resistor
R
GPIOPU4MA
kΩ
35.5
20.5
13.0
Fast GPIO internal pull-down resistor
f
R
GPIOPD
kΩ
17
14.3
10
Fast GPIO
PL6
and
PL7
(4-mA only) pull-down resistor
R
GPIOPD4MA
nA
400
-
-
Fast GPIO input leakage current, 0 V ≤ V
IN
≤ V
DD
GPIO
pins
g
I
LKG+
nA
400
-
-
Fast GPIO input leakage current, 0 V < V
IN
≤ V
DD
, Fast
GPIO pins configured as ADC or analog comparator
inputs
inputs
µA
60
-
-
DC injection current, V
IN
≤ 0 V
I
INJ-
mA
-0.5
-
-
Max negative injection if not voltage protected
d
I
MAXINJ-
ns
11.73
7.85
-
Fast GPIO rise time, 2-mA drive
h
T
GPIOR
ns
6.35
4.15
Fast GPIO rise time, 4-mA drive
h
ns
3.73
2.33
Fast GPIO rise time, 8-mA drive
h
ns
5.76
3.77
Fast GPIO rise time, 8-mA drive with slew rate control
h
ns
3.22
1.98
Fast GPIO rise time, 10-mA drive
h
ns
2.9
1.75
Fast GPIO rise time, 12-mA drive
h
December 13, 2013
2126
Texas Instruments-Advance Information
Electrical Characteristics