1.6.2 Code-Protect Configuration Bits

The device implements intermediate security features defined by the FSEC register. The Boot Segment (BS) is the highest privileged segment, and the General Segment (GS) is the lowest privileged segment. The total user code memory can be split into BS or GS. The size of the segments is determined by the BSLIM[12:0] bits. The relative location of the segments within user space does not change, such that BS (if present) occupies the memory area just after the Vector Space (VS) and Interrupt Vector Table (IVT), and the GS occupies the space just after BS (or if the Alternate Interrupt Vector Table (AIVT) is enabled, just after AIVT VS). The Configuration Segment (CS) is a small segment (less than a page, typically just one row) within the user Flash address space that contains all user configuration data that are loaded by the NVM controller during the Reset sequence.