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CPete12's avatar
CPete12
Icon for New Contributor rankNew Contributor
7 years ago

JTAG Secure Mode

Dear all, As I understand I can lock the JTAG port during programming, which is highly applreciated. However, in the Manual, it says that it is also possible to later unlock the port again, which i...
YuanLi_S_Intel's avatar
YuanLi_S_Intel
Icon for Regular Contributor rankRegular Contributor
7 years ago
Hi Christian, The JTAG Secure Mode is unlock by default. Once you LOCK the JTAG Secure Mode, the device is in JTAG Secure mode after power-up and configuration. If you are speaking about the feature to turn on (LOCK) and off (UNLOCK) the JTAG Secure Mode, what you need to do is burn the fuse of tamper-protection bit. This will permanently cause the FPGA in JTAG Secure Mode. If it is permanently in JTAG Secure Mode, that means, you cannot unlock the JTAG Secure Mode. Regards, Yuan Li