MSP432E401Y: Suggest Input Switch Detection in Ultra Low Power and efficient.

mightyChamp

Part Number: MSP432E401Y

Hello,

We ae using MCU on 3.2V battery.
We use GPIO Interrupt to wake up MCU by a Push Button. So, for that Active Low Edge Trigger Interrupt is used.
I have attached schematic for pin Configuration.

Please guide us,

Is anything we are missing to do, in this schematic for best performance?
Is values selected for resistor and capacitor is Good?
Is Active High Configuration will be preferred here?

Thank You

over 3 years ago

0 Gary Gao over 3 years ago

TI__Mastermind 39890 points

Actually MSP432E401 has internal pull up resistors that about 20K, you can keep the capacitor C1 and R2 that used for EDS protection and for the value I think you just need change the C1 to 1nF.

0 mightyChamp over 3 years ago in reply to Gary Gao

Prodigy 50 points

Device will be in noisy industrial area, So hardware denouncing with 1nF, seems to be low, may get false detection, could you please reply considering noisy environment.

0 Gary Gao over 3 years ago in reply to mightyChamp

TI__Mastermind 39890 points

OK, if in a noisy environment, to increase the value of C1 should be fine I think.

Arm-based microcontrollers

Arm-based microcontrollers forum

MSP432E401Y: Suggest Input Switch Detection in Ultra Low Power and efficient.