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Example Summary

GPIO port interrupt with an internal pull-up resistor. Uses an input pin to dependently drive an LED high or low.

Peripherals & Pin Assignments

Peripheral	Pin	Function
GPIOA	PA0	Open-Drain Output
GPIOB	PB21	Standard Input with internal pull-up
SYSCTL
EVENT
DEBUGSS	PA20	Debug Clock
DEBUGSS	PA19	Debug Data In Out

BoosterPacks, Board Resources & Jumper Settings

Visit LP_MSPM0G3507 for LaunchPad information, including user guide and hardware files.

Pin	Peripheral	Function	LaunchPad Pin	LaunchPad Settings
PA0	GPIOA	PA0	J27_9	PA0 is 5V tolerant open-drain so it requires pull-up J19 1:2 Use 3.3V pull-up J19 2:3 Use 5V pull-up PA0 can be connected to LED1 J4 ON Connect to LED1 J4 OFF Disconnect from LED1
PB21	GPIOB	PB21	J27_4	PB21 is connected to S2 button to GND with no external pull resistor Press S2 button to connect pin to GND Don’t use S2 button if not needed by application
PA20	DEBUGSS	SWCLK	N/A	PA20 is used by SWD during debugging J101 15:16 ON Connect to XDS-110 SWCLK while debugging J101 15:16 OFF Disconnect from XDS-110 SWCLK if using pin in application
PA19	DEBUGSS	SWDIO	N/A	PA19 is used by SWD during debugging J101 13:14 ON Connect to XDS-110 SWDIO while debugging J101 13:14 OFF Disconnect from XDS-110 SWDIO if using pin in application

Device Migration Recommendations

This project was developed for a superset device included in the LP_MSPM0G3507 LaunchPad. Please visit the CCS User’s Guide for information about migrating to other MSPM0 devices.

Low-Power Recommendations

TI recommends to terminate unused pins by setting the corresponding functions to GPIO and configure the pins to output low or input with internal pullup/pulldown resistor.

SysConfig allows developers to easily configure unused pins by selecting Board→Configure Unused Pins.

For more information about jumper configuration to achieve low-power using the MSPM0 LaunchPad, please visit the LP-MSPM0G3507 User’s Guide.

Example Usage

Compile, load and run the example. Press S2 button to see LED1 toggle.