LM3S5737 Datasheet, PDF (378/833 Pages) Texas Instruments – Stellaris® LM3S5737 Microcontroller

General-Purpose Input/Outputs (GPIOs)
Bit/Field
7:0
Name
PUE
Type
R/W
Reset
-
Description
Pad Weak Pull-Up Enable
A write of 1 to GPIOPDR[n] clears the corresponding GPIOPUR[n]
enables. The change is effective on the second clock cycle after the
write.
Note:
The default reset value for the GPIOAFSEL, GPIOPUR, and
GPIODEN registers are 0x0000.0000 for all GPIO pins, with
the exception of the four JTAG/SWD pins (PC[3:0]). These
four pins default to JTAG/SWD functionality. Because of this,
the default reset value of these registers for Port C is
0x0000.000F.
378
November 17, 2011
Texas Instruments-Production Data