Texas Instruments BoosterPack BOOSTXL-RS232, User Manual

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4 SLLU250 – November 2016
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Copyright © 2016, Texas Instruments Incorporated
BOOSTXL-RS232 BoosterPack™ Hardware
User's Guide
SLLU250 – November 2016
BOOSTXL-RS232 BoosterPack™ Hardware
1 Trademarks
BoosterPack, LaunchPad are trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.
2 Introduction
2.1 Overview
The RS232 BoosterPack provides the opportunity to communicate to and from a TI LaunchPad™ using
the RS232 serial protocol. This opens new capabilities for the microcontrollers to interface with industrial
equipment for debugging, for accessing memory directly for backup recovery, and for simplified data
transfer between systems with proprietary code.
The featured product is the TRS3122E , an ultra-low power, high-speed dual RS232 transceiver. It
supports data [RX, TX] channels as well as flow control [RTS, CTS] channels that can be easily assigned
to 1 of 10 general purpose input/output (GPIO) pins. These channels on the TRS3122E can be configured
to be either one set of data channels and one set of control channels for flow control or to be two sets of
data channels. However, this BoosterPack is configured for one set of data channels [RX, TX] and one set
of control channels [RTS, CTS]. With its unique doubler and tripler charge pump architecture, the
TRS3122E can operate at a VCC as low as 1.8 V while maintaining compatibility with 3.3-V and 5-V
supplies. This BoosterPack allows for operating voltages of 1.8 V or 3.3 V.
This device features a shutdown mode that reduces supply current as low as 0.5 µA. This can be done
manually or by setting the TRS3122E into its
Auto-Powerdown Plus mode. See Section 4 for more
information on the modes of operation of the TRS3122E along with how to set up the BoosterPack for
these modes.
2.1.1 What Is Included?
• 1× RS232 BoosterPack
• 7× Shunt Jumper
Figure 1 is a photo of the BOOSTXL-RS232 board.
Figure 1. BOOSTXL-RS232