Texas Instruments MSP-EXP430G2ET User manual

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MSP430G2553 LaunchPad™ Development Kit (MSP ‑ EXP430G2ET)
User's Guide
SLAU772A–June 2018–Revised March 2020
MSP430G2553 LaunchPad™ Development Kit
(MSP ‑‑ EXP430G2ET)
The MSP430G2553 LaunchPad™ Development Kit is an inexpensive and easy-to-use evaluation module
(EVM) for the MSP430G2xx entry-level series of microcontrollers (MCUs). It contains everything needed
to start developing on the ultra-low-power MSP430™ microcontroller platform, including an onboard debug
probe for programming, debugging and energy measurements. The board also features a push button and
three LEDs for creating a simple user interface.
Figure 1 shows the MSP-EXP430G2ET LaunchPad development kit.
Figure 1. MSP-EXP430G2ET LaunchPad Development Kit

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Contents
1 Getting Started............................................................................................................... 4
1.1 Introduction .......................................................................................................... 4
1.2 Key Features ........................................................................................................ 4
1.3 What's Included ..................................................................................................... 4
1.4 First Steps: Out-of-Box Experience .............................................................................. 4
1.5 Next Steps: Looking Into the Provided Code ................................................................... 5
2 Hardware...................................................................................................................... 6
2.1 Block Diagram....................................................................................................... 6
2.2 Hardware Features ................................................................................................. 7
2.3 Power ............................................................................................................... 10
2.4 Measure MSP430 Current Draw ................................................................................ 11
2.5 Clocking ............................................................................................................ 11
2.6 Using the eZ-FET Debug Probe With a Different Target .................................................... 11
2.7 BoosterPack Plug-in Module Pinout ............................................................................ 12
2.8 20-Pin DIP Socket................................................................................................. 13
2.9 Supported Devices................................................................................................ 14
2.10 Design Files........................................................................................................ 15
2.11 Hardware Change log ............................................................................................ 15
3 Software Examples ........................................................................................................ 15
3.1 Out-of-Box Software Example................................................................................... 16
3.2 Blink LED Example................................................................................................ 17
4 Resources................................................................................................................... 17
4.1 Integrated Development Environments......................................................................... 17
4.2 LaunchPad Development Kit Websites......................................................................... 20
4.3 MSPWare and TI Resource Explorer........................................................................... 21
4.4 MSP430G2553 MCU ............................................................................................. 21
4.5 Community Resources ........................................................................................... 22
5 FAQ .......................................................................................................................... 23
6 Schematics.................................................................................................................. 24
List of Figures
1 MSP-EXP430G2ET LaunchPad Development Kit ...................................................................... 1
2 MSP-EXP430G2ET Overview ............................................................................................. 6
3 MSP-EXP430G2ET Block Diagram ....................................................................................... 6
4 MSP430G2553 20-Pin N Package (Top View) .......................................................................... 7
5 eZ-FET Debug Probe ....................................................................................................... 8
6 eZ-FET Isolation Jumper Block Diagram................................................................................. 9
7 Application Backchannel UART in Device Manager................................................................... 10
8 MSP-EXP430G2ET Power Block Diagram ............................................................................. 10
9 BoosterPack Checker Tool ............................................................................................... 13
10 Pinout of Connector From LaunchPad Development Kit to BoosterPack Plug-in Module ....................... 13
11 Insert Device Into Target Socket......................................................................................... 14
12 TI Resource Explorer Cloud .............................................................................................. 18
13 CCS Cloud .................................................................................................................. 18
14 Directing the Project>Import Function to the Demo Project .......................................................... 19
15 When CCS Has Found the Project ...................................................................................... 20
16 Using TI Resource Explorer to Browse MSP-EXP430G2ET in MSPWare......................................... 21
17 Schematics (1 of 3) ........................................................................................................ 24
18 Schematics (2 of 3) ........................................................................................................ 25
19 Schematics (3 of 3) ........................................................................................................ 26

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List of Tables
1 EnergyTrace Technology................................................................................................... 8
2 Isolation Block Connections................................................................................................ 9
3 Supported Devices......................................................................................................... 14
4 Hardware Change Log .................................................................................................... 15
5 Software Examples ........................................................................................................ 16
6 IDE Minimum Requirements for MSP-EXP430G2ET ................................................................. 16
7 Source File.................................................................................................................. 16
8 Source File and Folders................................................................................................... 17
9 How MSP Device Documentation is Organized........................................................................ 21
Trademarks
LaunchPad, MSP430, BoosterPack, Code Composer Studio, EnergyTrace, ControlSuite, TivaWare, E2E
are trademarks of Texas Instruments.
IAR Embedded Workbench, C-SPY are registered trademarks of IAR Systems.
All other trademarks are the property of their respective owners.

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1 Getting Started
1.1 Introduction
The MSP430G2553 16-bit MCU has 16KB of flash, 512 bytes of RAM, up to 16-MHz CPU speed, an 8-
channel 10-bit ADC, capacitive-touch enabled I/Os, a universal serial communication interface, and
more – plenty to get started in your development.
Rapid prototyping is simplified by the 20-pin BoosterPack™ plug-in module headers that support a wide
range of available BoosterPack plug-in modules. You can quickly add features like wireless connectivity,
graphical displays, environmental sensing, and much more. You can either design your own BoosterPack
plug-in module or choose among many already available from TI and third-party developers.
The LaunchPad development kit features an integrated DIP target socket that supports up to 20 pins,
allowing MSP430 entry-level MCUs to be plugged into the LaunchPad development kit. The
MSP‑EXP430G2ET LaunchPad development kit comes with an MSP430G2553 MCU by default. The
MSP430G2553 MCU has the most memory available of the compatible entry-level MCUs.
Free software development tools are also available, such as TI's Eclipse-based Code Composer Studio™
IDE (CCS) and IAR Embedded Workbench®for MSP430 IDE (IAR EW430). Both of these IDEs support
EnergyTrace™ technology for real-time power profiling and debugging when paired with the
MSP430G2553 LaunchPad development kit. More information about the LaunchPad development kit,
including documentation and design files, can be found on the MSP430G2553 LaunchPad development
kit tool page.
1.2 Key Features
• High-quality 20-pin DIP socket for an easy plug-in or removal of the target MCU
• Supports MSP430G2xx1, MSP430G2xx2, MSP430G2xx3, and MSP430F20xx MCUs in PDIP14 or
PDIP20 packages (see Section 2.9 for a list of supported MCUs)
• EnergyTrace technology available for ultra-low-power debugging
• 20-pin LaunchPad development kit standard leveraging the BoosterPack plug-in module ecosystem
• Onboard eZ-FET debug probe
• 1 button and 3 LEDs for user interaction
1.3 What's Included
1.3.1 Kit Contents
• 1x MSP-EXP430G2ET LaunchPad development kit
• 1x micro USB-B cable
• 1x quick start guide
1.3.2 Software Examples
• Out-of-box software
1.4 First Steps: Out-of-Box Experience
An easy way to get started with the EVM is by using its preprogrammed out-of-box code. It demonstrates
some key features of the EVM.
1.4.1 Connecting to the Computer
Connect the LaunchPad development kit to a computer using the included USB cable. The green power
and yellow LDO LEDs should illuminate. For proper operation, drivers are needed. TI recommends
installing the drivers by installing an IDE such as TI CCS or IAR EW430. Drivers are also available at
http://www.ti.com/MSPdrivers.

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1.4.2 Running the Out-of-Box Experience
The LaunchPad development kit includes a pre-programmed MSP430G2553 MCU already installed in the
target socket. When the LaunchPad development kit is connected through USB, the Out-of-Box
Experience (OOBE) demo starts with a two LED toggle sequence.
Press button P1.3 to switch the application to the Live Temperature mode. The LaunchPad development
kit should start streaming live temperature data to the PC to be visualized in the MSP-EXP430G2ET
OOBE GUI or displayed in a serial terminal. A reference temperature is taken at the beginning of this
mode, and the LEDs of the LaunchPad development kit signal a rise or fall in temperature by varying the
brightness of the on-board red or green LED, respectively. The reference temperature can also be
recalibrated to the ambient temperature with another button press on P1.3.
You can influence the temperature of the MCU by blowing hot or cold air onto it, and you can then see
changes in the LED brightness or data changes on the GUI.
This GUI is created with GUI Composer 2.0 with the source available for customization, imported from the
TI Cloud Gallery. The serial communication port on the PC must be configured with 9600 bps, one stop
bit, and no flow control to display the values correctly.
NOTE: The OOB cloud GUI is supported in only the latest version of Chrome, Firefox, and Safari
browsers. An installer for the offline standalone GUI can also be downloaded from the TI
Cloud Gallery.
1.5 Next Steps: Looking Into the Provided Code
After the EVM features have been explored, the fun can begin. It is time to open an integrated
development environment and start editing the code examples. See Section 4 for available IDEs and
where to download them.
The quickest way to get started using the LaunchPad development kit is to use TI's Cloud Development
Tools. The cloud-based Resource Explorer provides access to all of the examples and resources in
MSPWare. Code Composer Studio Cloud is a simple cloud-based IDE that enables developing and
running applications on the LaunchPad development kit.
The out-of-box source code and more code examples are provided and available on the download page.
Code is licensed under BSD, and TI encourages reuse and modifications to fit specific needs.
Section 3 describes all functions in detail and provides a project structure to help familiarize you with the
code.
With the onboard eZ-FET debug probe, debugging and downloading new code is simple. A USB
connection between the EVM and a PC through the provided USB cable is all that is needed.

Target device
MSP430G2553
Crystal
32.768 kHz
Micro-B
USB
3.3-V LDO
ESD
protection
Debug
MCU
LED
Red, Green, Yellow
Crystal
4 MHz
UART, SBW to Target
User interface
1 button, 3 LEDs
20-pin
LaunchPad
standard headers
Power to target
Reset
button
EnergyTrace
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2 Hardware
Figure 2 shows an overview of the MSP-EXP430G2ET hardware.
Figure 2. MSP-EXP430G2ET Overview
2.1 Block Diagram
Figure 3 shows the block diagram.
Figure 3. MSP-EXP430G2ET Block Diagram

1DVCC
2P1.0/TA0CLK/ACLK/A0/CA0
3
4
5P1.3/ADC10CLK/CAOUT/VREF-/VEREF-/A3/CA3
6
7
8P2.0/TA1.0
9P2.1/TA1.1
10P2.2/TA1.1 11 P2.3/TA1.0
12 P2.4/TA1.2
13 P2.5/TA1.2
14
15
16 RST/NMI/SBWTDIO
17 TEST/SBWTCK
18 XOUT/P2.7
19 XIN/P2.6/TA0.1
20 DVSS
P1.6/TA0.1/ CA6/TDI/TCLKUCB0SOMI/UCB0SCL/A6/
P1.7/CAOUT /A7/CA7/TDO/TDI/UCB0SIMO/UCB0SDA
P1.1/TA0.0/ A1/CA1/UCA0RXD/UCA0SOMI
P1.2/TA0.1/ A2/CA2/UCA0TXD/UCA0SIMO
P1.4/SMCLK/ CA4/TCK/VREF+/VEREF+/A4/UCB0STE/UCA0CLK
P1.5/TA0.0/ A5/CA5/TMS/UCB0CLK/UCA0STE
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2.2 Hardware Features
2.2.1 MSP430G2553 MCU
The MSP430G2553 is a member of the MSP430 family of ultra-low-power MCUs. MSP430 MCUs features
different sets of peripherals targeted for various applications. The MCU architecture, combined with five
low-power modes, is optimized to achieve extended battery life in portable measurement applications.
Device features include:
• 1.8-V to 3.6-V operation
• 16-bit RISC architecture up to 16-MHz system clock
• 16KB of flash memory and 512 bytes of SRAM
• 8-channel 10-bit ADC
• 8-channel comparator
• Two 16-bit timers with three capture/compare registers (Timer_A)
• 24 GPIOs
• One universal serial communication interface (USCI_A) supports UART, IrDA, and SPI
• One USCI (USCI_B) supports SPI and I2C
Figure 4 shows the pinout of the MSP430G2553 20-pin N (PDIP) package.
Figure 4. MSP430G2553 20-Pin N Package (Top View)
2.2.2 eZ-FET Onboard Debug Probe With EnergyTrace Technology
To keep development easy and cost effective, TI's LaunchPad Development Kits integrate an onboard
debug probe, which eliminates the need for expensive programmers. The MSP-EXP430G2ET has the eZ-
FET debug probe (see Figure 5), which is a simple and low-cost debugger that supports all MSP430
MCUs.

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Figure 5. eZ-FET Debug Probe
The MSP-EXP430G2ET LaunchPad development kit features EnergyTrace technology but does not have
support for EnergyTrace++ technology (see Table 1). The EnergyTrace technology functionality varies
across the MSP430 portfolio.
Table 1. EnergyTrace Technology
Features EnergyTrace Technology EnergyTrace++ Technology
Current monitoring ✓ ✓
CPU state ✓
Peripheral and system states ✓
Devices supported All MSP430 MCUs MSP430FR59xx and MSP430FR69xx MCUs
Development tool required MSP-FET or eZ-FET MSP-FET or eZ-FET
The dotted line through J101 shown in Figure 5 divides the eZ-FET debug probe from the target area. The
signals that cross this line can be disconnected by jumpers on J101, the isolation jumper block. For details
on the isolation jumper block, see Section 2.2.3.
The eZ-FET also provides a backchannel UART-over-USB connection with the host, which can be very
useful during debugging and for easy communication with a PC. For details on the backchannel
connection, see Section 2.2.4.
For more information about the eZ-FET hardware, see the schematics in Section 6 and the Hardware
Design Files. For more information about the software and the debugger, see the eZ-FET wiki.
2.2.3 Debug Probe Connection: Isolation Jumper Block
The isolation jumper block at jumper J101 allows the user to connect or disconnect signals that cross from
the eZ-FET domain into the MSP430G2553 target domain. This includes eZ-FET Spy-Bi-Wire signals,
application UART signals, and 3.3-V and 5-V power.
Reasons to open these connections:
• To remove any and all influence from the eZ-FET debug probe for high-accuracy target power
measurements

eZ-FET
Debug
Probe
Isolation
Jumper Block
Spy-Bi-Wire
(SBW)
Emulation
Application
UART
3.3-V Power
5-V Power
Target
MSP430G2553
eZ-FETMSP430 Target
USB Connector
in out
LDO
BoosterPack Header BoosterPack Header
USB
EnergyTrace
Technology
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• To control 3-V and 5-V power flow between the eZ-FET and target domains
• To expose the target MCU pins for uses other than onboard debugging and application UART
communication
• To expose the programming and UART interface of the eZ-FET so that it can be used for MCUs other
than the onboard MCU.
Table 2. Isolation Block Connections
Jumper Description
GND Ground
5V 5-V VBUS from USB
3V3 3.3-V rail, derived from VBUS in the eZ-FET domain
RXD << Backchannel UART: The target G2553 receives data through this signal. The arrows indicate the direction of the signal.
TXD >> Backchannel UART: The target G2553 sends data through this signal. The arrows indicate the direction of the signal.
SBW RST Spy-Bi-Wire debug: SBWTDIO data signal. This pin also functions as the RST signal (active low).
SBW TST Spy-Bi-Wire debug: SBWTCK clock signal. This pin also functions as the TST signal.
Figure 6. eZ-FET Isolation Jumper Block Diagram
2.2.4 Application (or Backchannel) UART
The backchannel UART allows communication with the USB host that is not part of the main functionality
of the target application. This is useful during development and also provides a communication channel to
the PC host. This communication can be used to create graphical user interfaces (GUIs) and other
programs on the PC that communicate with the LaunchPad development kit.
Figure 6 shows the pathway of the backchannel UART. The backchannel UART is the UART on
USCI_A0.

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On the host side, a virtual COM port for the application backchannel UART is generated when the
LaunchPad development kit enumerates on the host. You can use any PC application that interfaces with
COM ports, including terminal applications like Hyperterminal or Docklight, to open this port and
communicate with the target application. You need to identify the COM port for the backchannel. On
Windows PCs, Device Manager can assist.
Figure 7. Application Backchannel UART in Device Manager
The backchannel UART is the "MSP Application UART1" port. In this case, Figure 7 shows COM13, but
this port can vary from one host PC to the next. After you identify the correct COM port, configure it in
your host application according to its documentation. You can then open the port and begin
communication to it from the host.
On the target MSP430G2553 side, the backchannel is connected to the USCI_A0 module. The eZ-FET
has a configurable baud rate; therefore, it is important to configure the baud rate of the PC application to
the same rate as the USCI_A0.
NOTE: The backchannel UART connection in the isolation jumper block can also be configured to
use a SW UART. The SW UART is done through the TimerA0 module located on pins P1.1
and P1.2. If the jumpers are in the horizontal position, the HW UART should be used. If the
jumpers are in the vertical position, the SW UART should be used. The orientation guidelines
are also printed in silkscreen on the board. It is recommended to use the HW UART
configuration.
2.3 Power
The board was designed to accommodate various powering methods, including through the onboard eZ-
FET as well as external or BoosterPack plug-in module power (see Figure 8).
Figure 8. MSP-EXP430G2ET Power Block Diagram

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2.3.1 eZ-FET USB Power
The most common power-supply scenario is from USB through the eZ-FET debugger. This provides 5-V
power from the USB and also regulates this power rail to 3.3 V for eZ-FET operation and 3.3 V to the
target side of the LaunchPad development kit. Power from the eZ-FET is controlled by jumper J101. For
3.3 V, make sure that a jumper is connected across the J101 3V3 terminal.
2.3.2 BoosterPack Plug-in Module and External Power Supply
Header J4 is present on the board to supply external power directly. It is important to comply with the
MCU voltage operation specifications when supplying external power. The MSP430G2553 has an
operating range of 1.8 V to 3.6 V. For more information, see the MSP430G2x53, MSP430G2x13 Mixed-
Signal Microcontrollers data sheet.
2.4 Measure MSP430 Current Draw
To measure the current draw of the MSP430G2553 using a multi-meter, use the 3V3 jumper on the J101
jumper isolation block. The current measured includes the target MCU and any current drawn through the
BoosterPack plug-in module headers.
To measure ultra-low power, follow these steps:
1. Remove the 3V3 jumper in the J101 isolation block, and attach an ammeter across this jumper.
2. Consider the effect that the backchannel UART and any circuitry attached to the MSP430G2553 may
have on current draw. Consider disconnecting these at the isolation jumper block, or at least consider
their current sinking and sourcing capability in the final measurement.
3. Make sure there are no floating inputs/outputs (I/Os) on the MSP430G2553. These cause unnecessary
extra current draw. Every I/O should either be driven out or, if it is an input, should be pulled or driven
to a high or low level.
4. Begin target execution.
5. Measure the current. If the current levels are fluctuating, it may be difficult to get a stable
measurement. It is easier to measure quiescent states.
EnergyTrace technology can also be used to compare various current profiles and better optimize your
energy performance.
2.5 Clocking
The MSP-EXP430G2ET provides an external clock in addition to the internal clocks in the MCU.
• Y1: 32.768-kHz 12.5-pF crystal
The 32.768-kHz crystal allows for lower LPM sleep currents than do the other low-frequency clock
sources. Therefore, the presence of the crystal allows the full range of low-power modes to be used.
By default, the crystal is not connected to the MSP430G2553 because the target pins are multiplexed with
two BoosterPack plug-in module header pins. 0-Ωresistors R3 and R9 must be removed, while R5 and
R7 must be shorted across to connect the external crystal to the MSP430G2553. See the onboard crystal
selection resistors silkscreen for how to configure the resistors to select between the crystal or the
BoosterPack plug-in module pins.
The internal clocks in the MCU default to the following configuration:
• MCLK: DCO at 1 MHz
• SMCLK: DCO at 1 MHz
• ACLK: LFXT1 at 32.768 kHz
For more information about configuring internal clocks and using the external oscillators, see the
MSP430x2xx Family User's Guide.
2.6 Using the eZ-FET Debug Probe With a Different Target
The eZ-FET debug probe on the LaunchPad development kit can interface to most MSP430 MCUs, not
just the onboard MSP430G2553 target MCU.

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1. Disconnect every jumper in the isolation jumper block. This is necessary, because the debug probe
cannot connect to more than one target at a time over the Spy-Bi-Wire (SBW) connection.
2. Make sure the target board has proper connections for SBW. Note that to be compatible with SBW, the
capacitor on RST/SBWTDIO cannot be greater than 2.2 nF. The documentation for designing MSP430
JTAG interface circuitry is the MSP430 Hardware Tools User's Guide.
3. Connect these signals from the debug probe side of the isolation jumper block to the target hardware:
• 5 V (if 5 V is needed)
• 3.3 V
• GND
• SBWTDIO
• SBWTCK
• TXD (if the UART backchannel is to be used)
• RXD (if the UART backchannel is to be used)
This wiring can be done either with jumper wires or by designing the board with a connector that plugs
into the isolation jumper block.
2.7 BoosterPack Plug-in Module Pinout
The LaunchPad development kit adheres to the 20-pin LaunchPad development kit pinout standard. A
standard was created to aid compatibility between LaunchPad development kit and BoosterPack plug-in
module tools across the TI ecosystem.
While most BoosterPack plug-in modules are compliant with the standard, some are not. The MSP-
EXP430G2ET LaunchPad development kit is compatible with all 20-pin BoosterPack plug-in modules that
comply with the standard. If the reseller or owner of the BoosterPack plug-in module does not explicitly
indicate compatibility with the MSP-EXP430G2ET LaunchPad development kit, compare the schematic of
the candidate BoosterPack plug-in module with the LaunchPad development kit to ensure compatibility.
Sometimes conflicts can be resolved by changing the MSP430G2553 pin function configuration in
software.
To check the compatibility of your desired BoosterPack plug-in modules for your design, with a
LaunchPad development kit of your choice, you can use the BoosterPack Checker tool (see Figure 9).
This allows you to select any LaunchPad development kit we offer and determine its compatibility with any
number of BoosterPack plug-in modules that we offer. You can also add your own BoosterPack plug-in
module to check its compatibility as you prototype that next design.

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Figure 9. BoosterPack Checker Tool
Figure 10 shows the 20-pin pinout of the connector from the LaunchPad development kit to a BoosterPack
plug-in module.
Software configuration of the pin functions plays a role in compatibility. The LaunchPad development kit
side of the dashed line shows only the applicable function for conforming to the standard. However, each
pin has other functionality that can be configured by the software. See the MSP430G2553 data sheet for
more details on individual pin functions.
Figure 10. Pinout of Connector From LaunchPad Development Kit to BoosterPack Plug-in Module
2.8 20-Pin DIP Socket
The MSP-EXP430G2ET comes with the MSP430G2553 MCU plugged into the DIP target socket.
However, both PDIP14 and PDIP20 packages of the MSP430G2xx entry-level MCUs and the
MSP430F20xx MCUs can be inserted into the DIP socket aligned to pin 1 (see Figure 11). For a complete
list of supported MCUs, see Section 2.9.

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Figure 11. Insert Device Into Target Socket
2.9 Supported Devices
TI offers several MSP430 MCUs in a PDIP package that are compatible with this LaunchPad development
kit. Table 3 lists the supported MCUs.
Table 3. Supported Devices
Part Number Family Description
MSP430F2001 F2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 128B RAM, Comparator
MSP430F2002 F2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 128B RAM, 10-Bit SAR A/D, USI for SPI/I2C
MSP430F2003 F2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 128B RAM, 16-Bit Sigma-Delta A/D, USI for SPI/I2C
MSP430F2011 F2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 128B RAM, Comparator
MSP430F2012 F2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 128B RAM, 10-Bit SAR A/D, USI for SPI/I2C
MSP430F2013 F2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 128B RAM, 16-Bit Sigma-Delta A/D, USI for SPI/I2C
MSP430G2001 G2xx 16-bit Ultra-Low-Power Microcontroller, 512B Flash, 128B RAM
MSP430G2101 G2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 128B RAM
MSP430G2111 G2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 128B RAM, Comparator
MSP430G2121 G2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 128B RAM, USI for SPI/I2C
MSP430G2131 G2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 128B RAM, 10-Bit SAR A/D, USI for SPI/I2C
MSP430G2201 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 128B RAM
MSP430G2211 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 128B RAM, Comparator
MSP430G2221 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 128B RAM, USI for SPI/I2C
MSP430G2231 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 128B RAM, 10-Bit SAR A/D, USI for SPI/I2C
MSP430G2102 G2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 256B RAM, USI for SPI/I2C
MSP430G2202 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 256B RAM, USI for SPI/I2C
MSP430G2302 G2xx 16-bit Ultra-Low-Power Microcontroller, 4KB Flash, 256B RAM, USI for SPI/I2C
MSP430G2402 G2xx 16-bit Ultra-Low-Power Microcontroller, 8KB Flash, 256B RAM, USI for SPI/I2C
MSP430G2112 G2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 256B RAM, Comparator, USI for SPI/I2C
MSP430G2212 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 256B RAM, Comparator, USI for SPI/I2C
MSP430G2312 G2xx 16-bit Ultra-Low-Power Microcontroller, 4KB Flash, 256B RAM, Comparator, USI for SPI/I2C
MSP430G2412 G2xx 16-bit Ultra-Low-Power Microcontroller, 8KB Flash, 256B RAM, Comparator, USI for SPI/I2C
MSP430G2132 G2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 256B RAM, 10-Bit SAR A/D, USI for SPI/I2C
MSP430G2232 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 256B RAM, 10-Bit SAR A/D, USI for SPI/I2C
MSP430G2332 G2xx 16-bit Ultra-Low-Power Microcontroller, 4KB Flash, 256B RAM, 10-Bit SAR A/D, USI for SPI/I2C
MSP430G2432 G2xx 16-bit Ultra-Low-Power Microcontroller, 8KB Flash, 256B RAM, 10-Bit SAR A/D, USI for SPI/I2C
MSP430G2152 G2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 256B RAM, 10-Bit SAR A/D, Comparator, USI for
SPI/I2C
MSP430G2252 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 256B RAM, 10-Bit SAR A/D, Comparator, USI for
SPI/I2C
MSP430G2352 G2xx 16-bit Ultra-Low-Power Microcontroller, 4KB Flash, 256B RAM, 10-Bit SAR A/D, Comparator, USI for
SPI/I2C

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Table 3. Supported Devices (continued)
Part Number Family Description
MSP430G2452 G2xx 16-bit Ultra-Low-Power Microcontroller, 8KB Flash, 256B RAM, 10-Bit SAR A/D, Comparator, USI for
SPI/I2C
MSP430G2153 G2xx 16-bit Ultra-Low-Power Microcontroller, 1KB Flash, 256B RAM, 10-Bit SAR A/D, Comparator, USCI for
I2C/SPI/UART
MSP430G2203 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 256B RAM, Comparator, USCI for I2C/SPI/UART
MSP430G2313 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 256B RAM, Comparator, USCI for I2C/SPI/UART
MSP430G2333 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 256B RAM, 10-Bit SAR A/D, Comparator, USCI for
I2C/SPI/UART
MSP430G2353 G2xx 16-bit Ultra-Low-Power Microcontroller, 2KB Flash, 256B RAM, 10-Bit SAR A/D, Comparator, USCI for
I2C/SPI/UART
MSP430G2403 G2xx 16-bit Ultra-Low-Power Microcontroller, 8KB Flash, 512B RAM,, Comparator, USCI for I2C/SPI/UART
MSP430G2413 G2xx 16-bit Ultra-Low-Power Microcontroller, 8KB Flash, 512B RAM, Comparator, USCI for I2C/SPI/UART
MSP430G2433 G2xx 16-bit Ultra-Low-Power Microcontroller, 8KB Flash, 512B RAM, 10-Bit SAR A/D, Comparator, USCI for
I2C/SPI/UART
MSP430G2453 G2xx 16-bit Ultra-Low-Power Microcontroller, 8KB Flash, 512B RAM, 10-Bit SAR A/D, Comparator, USCI for
I2C/SPI/UART
MSP430G2513 G2xx 16-bit Ultra-Low-Power Microcontroller, 16KB Flash, 512B RAM, Comparator, USCI for I2C/SPI/UART
MSP430G2533 G2xx 16-bit Ultra-Low-Power Microcontroller, 16KB Flash, 512B RAM, 10-Bit SAR A/D, Comparator, USCI for
I2C/SPI/UART
MSP430G2553 G2xx 16-bit Ultra-Low-Power Microcontroller, 16KB Flash, 512B RAM, 10-Bit SAR A/D, Comparator, USCI for
I2C/SPI/UART
2.10 Design Files
2.10.1 Hardware
See Section 6 for the schematics. All design files including schematics, layout, bill of materials (BOM),
Gerber files, and documentation are available in the MSP-EXP430G2ET Hardware Design Files.
2.10.2 Software
All design files including TI-TXT object-code firmware images, software example projects, and
documentation are available in the MSP-EXP430G2ET LaunchPad development kit download page.
2.11 Hardware Change log
Table 4 lists the revision history of the MSP430G2553 LaunchPad development kit hardware.
Table 4. Hardware Change Log
PCB Revision Description
Rev 1.0 Initial Release
3 Software Examples
Two software examples are included with the MSP430G2553 LaunchPad development kit (see Table 5),
which can be found in the MSP-EXP430G2ET LaunchPad development kit download page and are also
available inside MSPWare.

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Table 5. Software Examples
Demo Name BoosterPack Plug-in
Module Required Description More Details
OutOfBox_MSP-EXP430G2ET None The out-of-box demo preprogrammed on
the LaunchPad development kit from the
factory. Demonstrates features of the
MSP430G2553 MCU. Section 3.1
BlinkLED_MSP-EXP430G2ET None Blinks an LED on the LaunchPad
development kit at a fixed interval. Section 3.2
To use any of the software examples with the LaunchPad development kit, you must have an integrated
development environment (IDE) that supports the MSP430G2553 MCU.
Table 6. IDE Minimum Requirements for MSP-EXP430G2ET
Code Composer Studio IDE IAR Embedded Workbench for MSP430 IDE
v7.0 or later v7.11.1 or later
For more details on how to get started quickly, and where to download the latest CCS and IAR IDEs, see
Section 4.
3.1 Out-of-Box Software Example
This section describes the functionality and structure of the out-of-box software that is preloaded on the
EVM.
The Out-of-Box demo for the MSP-EXP430G2ET LaunchPad development kit starts with a two LED toggle
sequence. The demo also implements a real-time temperature sensor.
3.1.1 Source File
The OOBE project includes one main.c source file (see Table 7).
Table 7. Source File
Name Description
main.c Contains the main Out-of-Box demo and auxiliary functions
3.1.2 Overview
The online cloud-based MSP-EXP430G2ET OOBE GUI can be used to download this demo to your board
and visualize the temperature data. A serial terminal can also be used to display the data being sent from
the demo to the PC (application UART settings: 9600, 8, 1, n).
When powering up the Out-of-Box demo, the MSP-EXP430G2ET LaunchPad development kit starts with
a two LED toggle sequence. At any time, press S1 to switch to the Live Temperature mode.
3.1.3 Live Temperature Mode
In this mode, the LaunchPad development kit repeatedly measures the MSP430G2553 MCU internal
temperature and transfers the data to the PC through UART.
A reference temperature is taken at the beginning of this mode, and the LEDs of the LaunchPad
development kit signal a rise or fall in temperature by varying the brightness of the on-board red or green
LED, respectively. The reference temperature can also be recalibrated with another button press on P1.3.
The application keeps track of the temperature threshold, and when a new temperature data is acquired, it
is compared against the threshold. If measured temperature is below the threshold, the red LED will
illuminate, and if the measured temperature is above the threshold, the green LED will illuminate.

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Pressing S1 will recalibrate the temperature threshold in this mode. The further the recorded temperature
is from the threshold, the brighter the corresponding LEDs will illuminate.
The user can influence the temperature of the MCU by blowing hot or cold air and observing the changes
in the user LED brightness or see data changes on the GUI.
The demo application uses the on-chip peripherals of the MSP430G2553 MCU such as the 10-bit ADC,
which samples the internal temperature sensor, and 16-bit timers, which drive the PWM to vary brightness
of the LEDs and enable software UART for communication with the PC. The MSP430G2553 offers a USCI
interface that is capable of communicating through UART at up to 2 MBaud, but to be aligned with all the
other MSP430G2xx MCUs, the demo uses the Timer UART implementation, which can be used on all the
other MCUs. This way the demo can be used with any other MSP430G2xx MCU with an integrated ADC,
without any change in the program.
3.2 Blink LED Example
This simple software example shows how to software toggle a GPIO to blink an LED on the LaunchPad
development kit.
3.2.1 Source File Structure
The Blink LED project includes one main.c source file (see Table 8).
Table 8. Source File and Folders
Name Description
main.c The Blink LED main function
The main code uses register level access code to halt the watchdog timer and to configure and toggle the
P1.0 GPIO pin connected to the LED inside a software loop.
4 Resources
4.1 Integrated Development Environments
Although the source files can be viewed with any text editor, more can be done with the projects if they
are opened with a development environment like Code Composer Studio IDE (CCS) or IAR Embedded
Workbench IDE.
4.1.1 TI Cloud Development Tools
TI's Cloud-based software development tools provide instant access to MSPWare content and a web-
based IDE.
4.1.1.1 TI Resource Explorer Cloud
TI Resource Explorer Cloud provides a web interface for browsing examples, libraries and documentation
found in MSPWare without having to download files to your local drive.
Try TI Resource Explorer Cloud now at https://dev.ti.com/.

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Figure 12. TI Resource Explorer Cloud
4.1.1.2 Code Composer Studio Cloud
Code Composer Studio Cloud (CCS Cloud) is a web-based IDE that enables you to quickly create, edit,
build and debug applications for your LaunchPad development kit. No need to download and install large
software packages, simply connect your LaunchPad development kit and begin. You can choose to select
from a large variety of examples in MSPWare software and Energia or develop your own application. CCS
Cloud supports debug features such as execution control, breakpoints and viewing variables.
For a comparison of CCS Cloud and CCS Desktop, visit Should I use CCS Cloud or CCS Desktop.
Visit Code Composer Studio Cloud now at http://dev.ti.com.
Figure 13. CCS Cloud

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4.1.2 Code Composer Studio IDE
Code Composer Studio (CCS) Desktop is a professional integrated development environment that
supports TI's microcontroller and embedded processors portfolio. Code Composer Studio IDE comprises a
suite of tools used to develop and debug embedded applications. It includes an optimizing C/C++
compiler, source code editor, project build environment, debugger, profiler, and many other features.
You can learn more about CCS and download it at http://www.ti.com/tool/ccstudio.
CCS v7.0 or higher is required. When CCS has been launched, and a workspace directory chosen, use
Project>Import Existing CCS Eclipse Project. Direct it to the desired demo project directory that contains
main.c.
Figure 14. Directing the Project>Import Function to the Demo Project
Selecting the \CCS subdirectory also works. The CCS-specific files are located there.
When you click OK, CCS should recognize the project and allow you to import it. The indication that CCS
has found it is that the project appears in the box shown in Figure 15, and it has a checkmark to the left.

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Figure 15. When CCS Has Found the Project
Sometimes CCS finds the project but does not show a checkmark; this might mean that your workspace
already has a project by that name. You can resolve this by renaming or deleting that project. Even if you
do not see it in the CCS workspace, be sure to check the workspace directory on the file system.
4.1.3 IAR Embedded Workbench for 430 IDE
IAR Embedded Workbench for MSP430 (IAR EW430) is another very powerful integrated development
environment that allows you to develop and manage complete embedded application projects. It integrates
the IAR C/C++ Compiler, IAR Assembler, IAR ILINK Linker, editor, project manager, command line build
utility, and IAR C-SPY®Debugger.
You can learn more about IAR Embedded Workbench for MSP430 and download it at the IAR website.
IAR EW430 v7.11.1 or higher is required. To open the demo in IAR EW430, click
File>Open>Workspace…, and browse to the *.eww workspace file inside the \IAR subdirectory of the
desired demo. All workspace information is contained within this file.
The subdirectory also has an *.ewp project file. This file can be opened into an existing workspace by
clicking Project>Add-Existing-Project….
Although the software examples have all of the code required to run them, IAR EW430 users can
download and install MSPWare, which contains MSP430 libraries and the TI Resource Explorer. These
are already included in a CCS installation (unless the user selected otherwise).
4.2 LaunchPad Development Kit Websites
More information about the LaunchPad development kit, supported BoosterPack plug-in modules, and
available resources can be found at:
•MSP-EXP430G2ET tool folder: Resources specific to this particular LaunchPad development kit
•TI's LaunchPad portal: Information about all LaunchPad development kits from TI