38K2 Datasheet, PDF (110/151 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K2 Group
(2) Parallel I/O Mode
Parallel I/O mode is the mode which parallel output and input soft-
ware command, address, and data required for the operations
(read, program, erase, etc.) to a built-in flash memory. Use the ex-
clusive external equipment flash programmer which supports the
38K2 Group (flash memory version). Refer to each programmer
maker’s handling manual for the details of the usage.
User ROM and Boot ROM Areas
In parallel I/O mode, the user ROM and boot ROM areas shown in Fig-
ure 146 can be rewritten. Both areas of flash memory can be operated
on in the same way.
The boot ROM area is 4 Kbytes in size. It is located at addresses
F00016 through FFFF16. Make sure program and block erase opera-
tions 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 4 Kbyte block.
The boot ROM area has had a standard serial I/O mode control pro-
gram stored in it when shipped from the Mitsubishi factory. There-
fore, using the device in standard serial I/O mode, you must perform
program and block erase in the user ROM area.
Rev.3.00 Oct 15, 2006 page 110 of 147
REJ03B0193-0300