M16C80 Datasheet, PDF (301/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
31. Parallel I/O Mode
31. Parallel I/O Mode
Use an exclusive programer supporting M16C/80 (flash memory version).
Refer to the instruction manual of each programer maker for the details of use.
User ROM and Boot ROM Areas
In parallel I/O mode, the user ROM and boot ROM areas shown in Figure 29.3 can be rewritten. Both
areas of flash memory can be operated on in the same way.
Program and block erase operations can be performed in the user ROM area. The user ROM area and its
blocks are shown in Figure 29.3.
The boot ROM area is 8 Kbytes in size. In parallel I/O mode, it is located at addresses 0FFE00016 through
0FFFFFF16. Make sure program and block erase operations are always performed within this address
range. (Access to any location outside this address range is prohibited.)
In the boot ROM area, an erase block operation is applied to only one 8 Kbyte block. The boot ROM area
has had a standard serial I/O mode control program stored in it when shipped from the factory.
Therefore, using the device in standard serial input/output mode, you do not need to write to the boot
ROM area.
Rev.1.00 Aug. 02, 2005 ^{Page 290} of 329
REJ09B0187-0100