M16C62P_06 Datasheet, PDF (380/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
24. Precautions
24.6 Protect
Set the PRC2 bit to “1” (write enabled) and then write to any address, and the PRC2 bit will be cleared to “0” (write
protected). The registers protected by the PRC2 bit should be changed in the next instruction after setting the PRC2
bit to “1”. Make sure no interrupts or DMA transfers will occur between the instruction in which the PRC2 bit is set
to “1” and the next instruction.
Rev.2.41 Jan 10, 2006 Page 365 of 390
REJ09B0185-0241