CCS/MSP430FR4133: Test pin lead to MCU reset issue in msp430fr4133/msp430fr5969/msp430f5438

Gary Gao

Part Number: MSP430FR4133

Tool/software: Code Composer Studio

The issue is that when I make the test pin high or low on and off, the MCU will reset sometimes. The test signal as below:

Questions: what cause the Rst/NMI reset event ?

over 6 years ago

0 Wei.Jetim Zhao over 6 years ago

TI__Genius 13215 points

Hi Gary,

I will check this issue with team and feedback you.

0 Jovi He over 6 years ago

TI__Intellectual 830 points

Hi Gary,

Would you please check if the DVCC decoupling caps (10uF+0.1uF) are connected and not damaged? Better follow the DS recommendation.
This kind of issue may happen if the caps are removed.

Thanks,
Jovi He

0 Gary Gao over 6 years ago in reply to Jovi He

TI__Mastermind 32185 points

Hi Jovi:
The hardware are LaunchPads and I test the caps are not breakdown.
Thanks

0 Jovi He over 6 years ago

TI__Intellectual 830 points

Gary,

1. Configure the RST/NMI to NMI function if the RST function is not required

2. In field, if external noise at TEST pin trigger this RST,propose to add external pull-down resistor for improvement. you may refer to the doc http://www.ti.com/lit/ug/slau320z/slau320z.pdf

Hope it helps.

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CCS/MSP430FR4133: Test pin lead to MCU reset issue in msp430fr4133/msp430fr5969/msp430f5438