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Add a debounce to PCIE_HOST_TO_FPGA_PERST #97

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Aaron-Hartwig opened this issue May 5, 2023 · 2 comments · Fixed by #219
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Add a debounce to PCIE_HOST_TO_FPGA_PERST #97

Aaron-Hartwig opened this issue May 5, 2023 · 2 comments · Fixed by #219
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Sidecar Sequencer

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@Aaron-Hartwig
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Per https://github.com/oxidecomputer/hardware-sidecar/issues/787, this pin has an undefined state and could oscillate (among other undefined things). Adding some amount of debounce (10 ms?) would help make sure that is not occurring.
@nathanaelhuffman nathanaelhuffman mentioned this issue Sep 26, 2024
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@nathanaelhuffman
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Note that this has proven to be an actual problem and really should be addressed. Scope captures here: #202

@Aaron-Hartwig Aaron-Hartwig self-assigned this Sep 26, 2024
@Aaron-Hartwig Aaron-Hartwig mentioned this issue Sep 26, 2024
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@Aaron-Hartwig
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I've also wrote up #226 as a follow on to this.

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Sidecar: add 100us debounce to PCIe PERST input from host oxidecomputer/quartz
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@Aaron-Hartwig @nathanaelhuffman