13.31.18.6.4 Programming the Security Bit
Two device programmers, Silicon Sculptor and Flash Pro, are available for ProASIC and ProASICPLUS devices. If the programming file contains the security key, by default the Silicon Sculptor and Flash Pro programming software automatically enables the "secure" option and programs the security key. You can turn this off, should you decide not to program using the security key.
Please refer to the AC185: Implementation of Security in Microchip's ProASIC and ProASICPLUS Flash-Based FPGAs for more details.
