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【 Q&A 】 No high level appears when PIR test timing, is PIR dead?

2024-12-02

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Q: No high level appeared when pir was testing the timing. Did pir crash? Answer: pir is not dead, it should be PIR data ready to produce high power, is forced to pull down by the MCU. You can directly supply power to the pir, use the oscilloscope to see whether the doci pin is generated by high level signal, and test the pir. If yes, look again to see if the software has the pin pin forced down operation.
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