Texas Instruments TM4C1294NCPDT User Manual

27.14 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 743 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
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.
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.
Table 27-34. Fast GPIO Module Characteristics
abcd
UnitMaxNomMinParameter NameParameter
pF50--Capacitive loading for measurements given in this
table
e
C
LGPIO
kΩ20.216.012.1Fast GPIO internal pull-up resistor
f
R
GPIOPU
kΩ40-25Fast GPIO PL6 and PL7 (4-mA only) pull-up resistorR
GPIOPU4MA
kΩ35.520.513.0Fast GPIO internal pull-down resistor
f
R
GPIOPD
kΩ1714.310Fast GPIO PL6 and PL7 (4-mA only) pull-down resistorR
GPIOPD4MA
nA400--Fast GPIO input leakage current, 0 V ≤ V
IN
≤ V
DD
GPIO
pins
g
I
LKG+
nA400--Fast GPIO input leakage current, 0 V < V
IN
≤ V
DD
, Fast
GPIO pins configured as ADC or analog comparator
inputs
µA60--DC injection current, V
IN
≤ 0 VI
INJ-
mA-0.5--Max negative injection if not voltage protected
d
I
MAXINJ-
ns11.737.85
-
Fast GPIO rise time, 2-mA drive
h
T
GPIOR
ns6.354.15Fast GPIO rise time, 4-mA drive
h
ns3.732.33Fast GPIO rise time, 8-mA drive
h
ns5.763.77Fast GPIO rise time, 8-mA drive with slew rate control
h
ns3.221.98Fast GPIO rise time, 10-mA drive
h
ns2.91.75Fast GPIO rise time, 12-mA drive
h
1849June 18, 2014
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TM4C1294NCPDT Microcontroller

Texas Instruments TM4C1294NCPDT Specifications

General

Brand	Texas Instruments
Model	TM4C1294NCPDT
Category	Microcontrollers
Language	English