3069RF-ZTAT Datasheet, PDF (650/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

18.6 Protection
There are two kinds of flash memory program/erase protection: hardware and software protection.
18.6.1 Hardware Protection
Programming and erasing of flash memory is forcibly disabled or suspended by hardware
protection. In this state, the downloading of an on-chip program and initialization of the flash
memory are possible. However, an activated program for programming or erasure cannot program
or erase locations in a user MAT, and the error in programming/erasing is reported in the
parameter FPFR.
Rev. 5.0, 09/04, page 628 of 978