D12320VF25V Datasheet, PDF (727/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
17.22.7 Programming/Erasing Interface
Programming/erasing is executed by downloading the on-chip program to the on-chip RAM and
specifying the program address/data and erase block by using the interface register/parameter.
The procedure program is made by the user in user program mode and user boot mode. The
overview of the procedure is as follows. For details, see section 17.24.2, User Program Mode.
Start user procedure
program for
programming/erasing
Select on-chip program
to be downloaded and
set download destination
Download on-chip
program by setting
FKEY and the SCO bits
Initialization execution
(download program execution)
Programming (in 128-byte
units) or erasing (in
one-block units)
(download program execution)
Programming/erasing
No
completed?
Yes
End user procedure
program
Figure 17.64 Overview of User Procedure Program
1. Selection of on-chip program to be downloaded and setting of download destination
This LSI has programming/erasing programs and they can be downloaded to the on-chip
RAM. The on-chip program to be downloaded is selected by setting the corresponding bits in
the programming/erasing interface register. The download destination can be specified by
FTDAR.
Rev.7.00 Feb. 14, 2007 page 693 of 1108
REJ09B0089-0700