Parallel I/O Mode - Renesas M16C/60 Series Hardware Manual

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M16C/6N5 Group

Parallel I/O Mode

In parallel I/O mode, the user ROM and boot ROM areas can be rewritten by using a parallel programmer
suitable for the M16C/6N5 group. For more information about parallel programmers, contact the manufac-
turer of your parallel programmer. For details on how to use, refer to the user's manual included with your
parallel programmer.
User ROM and Boot ROM Areas
In the boot ROM area, an erase block operation is applied to only one 4-Kbyte block. The boot ROM area
contains a standard serial I/O and CAN I/O modes based rewrite control program which was written in it
when shipped from the factory. Therefore, when using a serial programmer or a CAN programmer, be
careful not to rewrite the boot ROM area.
When in parallel I/O mode, the boot ROM area is located at addresses 0FF000
rewriting the boot ROM area, make sure that only this address range is rewritten. (Do not access other
than the addresses 0FF000
ROM Code Protect Function
The ROM code protect function inhibits the flash memory from being read or rewritten. (Refer to "Functions
to Prevent Flash Memory from Rewriting".)
Rev.1.00 2003.05.30 page 283
to 0FFFFF .)
16 16
Flash Memory
to 0FFFFF . When
16 16