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What's the meaning of the "HW Default Mode" for a Lattice MachXO3 device? I've seen this term come up a few times in the configuration guide but there is no clear definition of it. Does this refer to erased/blank devices?

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Note: To 'Check Device ID' over the I2C configuration port, the MachXO3 must be in Feature Row HW Default Mode state (that is, blank/erased)

FPGA-TN-02055-2.7 page 49. So, you guessed right. It applies to unprogrammed or erased devices.

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