11.1.5.4 Lock Regions

Several lock bits are used to protect write and erase operations on lock regions. A lock region is composed of several consecutive pages, and each lock region has its associated lock bit.

Table 11-2. Flash Lock Bits
Flash Size (Kbytes) Number of Lock Bits Lock Region Size
2048 128 16 Kbytes
1024 64 16 Kbytes
512 32 16 Kbytes

Asserting the ERASE pin clears the lock bits, thus unlocking the entire Flash.