Functional Description
11
SPMU372A – September 2015 – Revised October 2016
Copyright © 2015–2016, Texas Instruments Incorporated
Hardware Description
2.1.6 User Switches and LED's
Two user switches are provided for input and control of the TM4C129ENCPDT software. The switches are
connected to GPIO pins PJ0 and PJ1.
A reset switch and a wake switch are also provided. The reset switch initiates a system reset of the
microcontroller whenever it is pressed and released. Pressing the reset switch also asserts the reset
signal to the BoosterPack and Breadboard headers. The wake switch is one way to bring the device out of
hibernate mode.
Four user LEDs are provided on the board. D1 and D2 are connected to GPIOs PN1 and PN0. These
LEDs are dedicated for use by the software application. D3 and D4 are connected to GPIOs PF4 and
PF0, which can be controlled by user’s software or the integrated Ethernet module of the microcontroller.
A power LED is also provided to indicate that 3.3 V power is present on the board.