FLASH MEMORY VERSION
19.3 Flash memory serial I/O mode
19.3 Flash memory serial I/O mode
In the flash memory serial I/O mode, by using a dedicated serial programmer, the contents of the user ROM
area can be reprogrammed with the microcomputer mounted on the final printed circuit board. About the
serial programmer concerned, consult its manufacturer, and for more information on using it, refer to the
user’s manual of the serial programmer.
Note that if the boot ROM area has been reprogrammed in the flash memory parallel I/O mode, the flash
memory serial I/O mode cannot be used. (Refer to section “19.4 Flash memory parallel I/O mode.”)
Addresses FF9016 to FF9F16 (the user ROM area) are reserved for serial or parallel programmers. Therefore,
be sure not to use to this area.
19.3.1. Pin description
Table 19.3.1 lists the pin description in the flash memory serial I/O mode, and each of Figures 19.3.1 and
19.3.2 shows the pin configuration in this mode.
7905 Group User’s Manual Rev.1.0
19-19
RENESAS [ RENESAS TECHNOLOGY CORP ]
