Advantech MIC-770 V2 User Manual page 82

3.2.3.9 Security Configuration
RTC Memory Lock

Enable will lock bytes 38h-3Fh in the lower/upper 128-byte bank of RTC RAM.
BIOS Lock

"Enable or Disable" the PCH BIOS Lock Enable feature. Required to be enabled
to ensure SMM protection of flash.
Force unlock on all GPIO pads

If Enabled, BIOS will force all GPIO pads to be in unlocked state.
MIC-770 V2 User Manual
Figure 3.47 Security Configuration
68