# Hardware Interrupt to Pin Number

**URL:** <https://forums.developer.nvidia.com/t/hardware-interrupt-to-pin-number/53027>\
**Category:** Jetson TX2\
**Created:** [August 30, 2017, 9:43pm UTC](https://forums.developer.nvidia.com/t/hardware-interrupt-to-pin-number/53027 "2017-08-30T21:43:30Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![jp444](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@jp444](https://forums.developer.nvidia.com/u/jp444)\
**Post date:** [August 30, 2017, 9:43pm UTC](https://forums.developer.nvidia.com/t/hardware-interrupt-to-pin-number/53027/1 "2017-08-30T21:43:30Z")

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I am experiencing a hardware issue with our custom board which is causing the cpu to get interrupted close to 100000 times per second. I’m trying to track the issue down but I’m having trouble figuring out which pin is the culprit. In /proc/interrupts I found the following interrupt is the one having the problem.

:/home/nvidia# cat /proc/interrupts  
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5  
 380: 217641179 0 0 0 0 0 tegra-gpio-aon 56 Edge Power

So it is irq 380, with a label “Power” and a number 56. I’m not sure what the number 56 means. Can anyone help me track down which pin is hooked up to this interrupt?

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**Author:** ![Trumany](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/trumany/32/14043_2.png) [@Trumany](https://forums.developer.nvidia.com/u/Trumany)\
**Post date:** [August 31, 2017, 3:16am UTC](https://forums.developer.nvidia.com/t/hardware-interrupt-to-pin-number/53027/2 "2017-08-31T03:16:14Z")

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What’s your connection on LOW\_BAT on your carrier board? Interrupt 56 is for low battery detection.

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**Author:** ![jp444](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@jp444](https://forums.developer.nvidia.com/u/jp444)\
**Post date:** [August 31, 2017, 5:12pm UTC](https://forums.developer.nvidia.com/t/hardware-interrupt-to-pin-number/53027/3 "2017-08-31T17:12:22Z")

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Thanks for the response, we are not using the BATLOW (Pin C7) so it is disconnected. We only get the interrupts when our carrier board is being charged so it is likely a noise issue. Should this pin be ties to VCC? Also, is there a way that I can disable the interrupt generation for this pin? Since we are not using it, it seems like it would be best to have it left unconfigured.

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**Author:** ![Trumany](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/trumany/32/14043_2.png) [@Trumany](https://forums.developer.nvidia.com/u/Trumany)\
**Post date:** [September 1, 2017, 5:08am UTC](https://forums.developer.nvidia.com/t/hardware-interrupt-to-pin-number/53027/4 "2017-09-01T05:08:39Z")

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Did you try pulling it to high? Yes, looks like a noise issue. If pulling high could solve it, you’d better to add a PU to make it stable.

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**Author:** ![nadeemm](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/nadeemm/32/367020_2.png) [@nadeemm](https://forums.developer.nvidia.com/u/nadeemm)\
**Post date:** [October 18, 2021, 6:26pm UTC](https://forums.developer.nvidia.com/t/hardware-interrupt-to-pin-number/53027/5 "2021-10-18T18:26:52Z")

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