M16C30P_07 Datasheet, PDF (243/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
19. Flash Memory Version
19.5 Parallel I/O Mode
In parallel I/O mode, the user ROM area and the boot ROM area can be rewritten by a parallel programmer
supporting the M16C/30P Group. Contact your parallel programmer manufacturer for more information on the
parallel programmer. Refer to the user's manual included with your parallel programmer for instructions.
19.5.1 User ROM and Boot ROM Areas
An erase block operation in the boot ROM area is applied to only one 4 Kbyte block. The rewrite control
program in standard serial I/O mode is written in the boot ROM area before shipment. Do not rewrite the boot
ROM area if using the serial programmer.
In parallel I/O mode, the boot ROM area is located in addresses 0FF000h to 0FFFFFh. Rewrite this address
range only if rewriting the boot ROM area. (Do not access addresses other than addresses 0FF000h to
0FFFFFh.)
19.5.2 ROM Code Protect Function
The ROM code protect function prevents the flash memory from being read and rewritten in parallel I/O mode.
(Refer to 19.2 Functions To Prevent Flash Memory from Rewriting.)
Rev.1.22 Mar 29, 2007 Page 227 of 291
REJ09B0179-0122