M306H7MG-XXXFP Datasheet, PDF (307/329 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

M306H7MG-XXXFP/MC-XXXFP/FGFP
17. FLASH MEMORY VERSION
17.10 Parallel I/O Mode
In parallel input/output mode, the user ROM and boot ROM areas can be rewritten by using a parallel programmer
suitable for M306H7FGFP. For more information about parallel programmers, contact the manufacturer of your
parallel programmer. For details on how to use, refer to the user’s manual included with your parallel programmer.
17.10.1 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 input/output mode based rewrite control program which was written in it when
shipped from the factory. Therefore, when using a serial programmer, be careful not to rewrite the boot ROM
area.
When in parallel output mode, the boot ROM area is located at addresses 0FF00016 to 0FFFFF16. When
rewriting the boot ROM area, make sure that only this address range is rewritten. (Do not access other than the
addresses 0FF00016 to 0FFFFF16.)
17.10.2 ROM Code Protect Function
The ROM code protect function inhibits the flash memory from being read or rewritten. (Refer to the
description of the functions to inhibit rewriting flash memory version.)
Rev.2.10 Oct 25, 2006 Page 307 of 326
REJ03B0152-0210