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MSP430F5342: Implementing Port Interrupt Functionality in a Normal GPIO pins

Sam Durai
Intellectual 400 points

Part Number: MSP430F5342

Tool/software:

Hi Team,

I am using MSP430F5342IRGZR device. The GPIO pins with port interrupt feature are not sufficient for my design. So, I am looking the way to give port interrupt feature to a normal GPIO pin.

 Is there any way to do this?

  • 0
    Guru 102725 points

    Timer Input Capture is effectively a GPIO interrupt combined with a timer fetch. It's possible to use the former and ignore the latter. [Make sure SCS=0.] The "GPIO" interrupt would appear as a Capture interrupt from the timer. I don't think you can use this for (LPM4.5) Wakeup, if that's what you're looking for.

    It looks like you can use the PortMapper on any of the P4 pins. Data sheet (SLAS706F) Table 6-6 provides the PortMapper choices, all of which are on TB0. But that would give you 7x additional interrupt pins (CCR0-6). Since you're not interested in the capture value, you could at the same time use TB0 for (internal) timing.

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