Datasheet

g. Θ
JB
is not a pure reflection of the internal resistance of the package because it includes the resistance of the testing board
and environment. It is recommended that equations containing Ψ
JT
and Ψ
JB
be used for best results.
32.3 Recommended Operating Conditions
The following sections describe the recommended DC operating conditions and GPIO operating
characteristics for the device.
32.3.1 DC Operating Conditions
Table 32-6. Recommended DC Operating Conditions
UnitMaxNomMinParameter NameParameter
V3.633.32.97V
DD
supply voltageV
DD
V3.633.32.97V
DDA
supply voltageV
DDA
a
V1.321.21.14V
DDC
supply voltage, Run modeV
DDC
V0.95-0.85V
DDC
supply voltage, Deep-sleep modeV
DDCDS
a. To ensure proper operation, V
DDA
must be powered up before V
DD
if sourced from different supplies, or connected to the
same supply as V
DD
. There is not a restriction on order for powering off.
32.3.2 Recommended GPIO Operating Characteristics
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
All other GPIOs have a fast GPIO pad-type.
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 32-7 on page 2103 detail the GPIO operating conditions for these two different pad types.
Table 32-7. Recommended FAST GPIO Pad Operating Conditions
UnitMaxNomMinParameter NameParameter
V4-0.65 * V
DD
Fast GPIO high-level input voltageV
IH
nA300--Fast GPIO high-level input current
a
I
IH
V0.35 * V
DD
-0Fast GPIO low-level input voltageV
IL
nA-200--Fast GPIO low-level input current
a
I
IL
V--0.49Fast GPIO Input HysteresisV
HYS
V--2.4Fast GPIO High-level output voltageV
OH
V0.40--Fast GPIO Low-level output voltageV
OL
2103December 13, 2013
Texas Instruments-Advance Information
Tiva
™
TM4C129XNCZAD Microcontroller