哦, 没有怎么关注过这两个保护位.
从数据手册看: WRSR
The two bits, BP1 and BP0 are nonvolatile cells that have the same properties and functions as the regular memory cells (e.g. WREN, tWC, RDSR).
考虑到成本,就地取才,用本身的Flash单元来存是最合理的。而且手册也说了“are nonvolatile cells that have the same properties and functions as the regular memory cells(e.g. WREN, tWC, RDSR).”,所以寿命当然也和WREN等一样罗。