Functional Description
8
SPMU365C – March 2014 – Revised October 2016
Copyright © 2014–2016, Texas Instruments Incorporated
Hardware Description
2.1.2 Ethernet Connectivity
The Connected LaunchPad is designed to connect directly to an Ethernet network using RJ45 style
connectors. The microcontroller contains a fully integrated Ethernet MAC and PHY. This integration
creates a simple, elegant and cost-saving Ethernet circuit design. Example code is available for both the
uIP and LwIP TCP/IP protocol stacks. The embedded Ethernet on this device can be programmed to act
as an HTTP server, client or both. The design and integration of the circuit and microcontroller also enable
users to synchronize events over the network using the IEEE1588 precision time protocol.
When configured for Ethernet operation, it is recommended that the user configure LED D3 and D4 to be
controlled by the Ethernet MAC to indicate connection and transmit/receive status.
2.1.3 USB Connectivity
The Connected LaunchPad is designed to be USB 2.0 ready. A TPS2052B load switch is connected to
and controlled by the microcontroller USB peripheral, which manages power to the USB micro A/B
connector when functioning in a USB host. When functioning as a USB device, the entire Connected
LaunchPad can be powered directly from the USB micro A/B connector. Use JP1 to select the desired
power source.
USB 2.0 functionality is provided and supported directly out of the box with the target USB micro A/B
connector. High-speed USB 3.0 functionality can be enabled by adding an external USB PHY. The USB
external PHY control and data signals are provided on the breadboard expansion header X11.
2.1.4 Motion Control
The Connected LaunchPad includes the Tiva C Series Motion Control PWM technology, featuring a PWM
module capable of generating eight PWM outputs. The PWM module provides a great deal of flexibility
and can generate simple PWM signals – for example, those required by a simple charge pump – as well
as paired PWM signals with dead-band delays, such as those required by a half-H bridge driver. Three
generator blocks can also generate the full six channels of gate controls required by a 3-phase inverter
bridge.
A quadrature encoder interface (QEI) is also available to provide motion control feedback.
See the
section of this document for details about the availability of these
signals on the BoosterPack interfaces.
2.1.5 User Switches and LED's
Two user switches are provided for input and control of the TM4C1294NCPDTI 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 volt power is present on the board.
