Renesas M16C/50 Series User Manual page 695

M16C/5L Group, M16C/56 Group
26.4 Optional Function Select Area
In an option function select area, the MCU state after reset and the function to prevent rewrite in parallel
I/O mode are selected.
The option function select area is not an SFR, and therefore cannot be rewritten by a program. Set an
appropriate value when writing a program to the flash memory. The entire option function select area
becomes FFh when the block including the option function select area is erased.
In blank products, the OFS1 and OFS2 address values are FFh when shipped. After a value is written by
the user, this address takes on the written value. In programmed products, the OFS1 and OFS2
addresses are the value set in the user program prior to shipping.
0FFFDBh to 0FFFD8h
0FFFFFh to 0FFFFCh
Figure 26.2 Option Function Select Area
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
Address
OFS2
OFS1
Reset vector
4 bytes
26. Flash Memory
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