NHD-7.0-800480FT-CSXP-T SPI Interface

Shea McLaughlin

Once the device is initialized as per the documentation, a read of the REG_ID register should return a value of 0x7C, which I am able to see clearly when using a digital oscilloscope. The problem is that the host MCU is unable to recognize the data since the voltage of the MISO line remains significantly lower than the expected minimum of 2.9V. My MCU requires a minimum of 2.1V to register a logical high, so within normal operation there should be no issue. Attached is the referenced oscilloscope reading, where red is the SCK line, and yellow is the MISO line. Any ideas on problems that could lead to this issue are appreciated.

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  • Engineering Support
    Community moderator

    Thank you for your inquiry. This issue has been addressed through email.

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