Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X 数据表
产品代码
DK-TM4C129X
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.
characteristics for the device.
32.3.1
DC Operating Conditions
Table 32-6. Recommended DC Operating Conditions
Unit
Max
Nom
Min
Parameter Name
Parameter
V
3.63
3.3
2.97
V
DD
supply voltage
V
DD
V
3.63
3.3
2.97
V
DDA
supply voltage
V
DDA
a
V
1.32
1.2
1.14
V
DDC
supply voltage, Run mode
V
DDC
V
0.95
-
0.85
V
DDC
supply voltage, Deep-sleep mode
V
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
– 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.
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 32-7 on page 2103 detail the GPIO operating conditions for these two different pad types.
Table 32-7. Recommended FAST GPIO Pad Operating Conditions
Unit
Max
Nom
Min
Parameter Name
Parameter
V
4
-
0.65 * V
DD
Fast GPIO high-level input voltage
V
IH
nA
300
-
-
Fast GPIO high-level input current
a
I
IH
V
0.35 * V
DD
-
0
Fast GPIO low-level input voltage
V
IL
nA
-200
-
-
Fast GPIO low-level input current
a
I
IL
V
-
-
0.49
Fast GPIO Input Hysteresis
V
HYS
V
-
-
2.4
Fast GPIO High-level output voltage
V
OH
V
0.40
-
-
Fast GPIO Low-level output voltage
V
OL
2103
December 13, 2013
Texas Instruments-Advance Information
Tiva
™
TM4C129XNCZAD Microcontroller