M16C6K9 Datasheet, PDF (273/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Parallel I/O Mode
Parallel I/O mode
Parallel I/O mode is to input and output the software command, address and data in parallel to access the
on-chip flash memory (read, program, erase etc.).
Please use the specific device (programmer) supported for M16C/6K9 Group. Referring to the guideline etc.
of each device manufacture for the usage.
User ROM area and boot ROM area
In parallel I/O mode, both user ROM area and boot ROM area showed in Fig.AB-1 can be reprogrammed.
The access method to both areas is the same.
The size of boot ROM area is 4K bytes. The addresses are allocated in 0FF00016– 0FFFFF16. 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, erase block operation is applied to only one 4K bytes block. The boot ROM area has
had a standard serial I/O mode control program stored in it when shipped from Renesas factory. Therefore,
if the standard serial I/O mode is used, the rewriting to the boot ROM area is not necessary.
Rev.1.00 Jun 06, 2003 page 273 of 290