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What is the difference between Secure and Secure Plus programming functions in MachXO2/3?
Category: Programmer
Tool: Diamond
Device: MachXO2, MachXO3
Both Secure and Secure Plus are security functions, but the difference is the readback result of UFM (User Flash Memoru).
If you include Secure when programming with the Programmer, the config data (CFM) will read "all 1's", but used UFMs will read "all 0", while used UFMs will read held values and unused UFMs will read "all 0". backed up.
On the other hand, when programmed as Secure Plus, both CFM and UFM read "all ones" during readback.
In addition, there is no way to disable Secure and Secure Plus except to erase CFM / UFM once by Erase operation.
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