Datasheet

Section 17 ROM
Rev.7.00 Feb. 14, 2007 page 693 of 1108
REJ09B0089-0700
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.
Download on-chip
program by setting
FKEY and the SCO bits
Initialization execution
(download program execution)
Select on-chip program
to be downloaded and
set download destination
Programming (in 128-byte
units) or erasing (in
one-block units)
(download program execution)
Start user procedure
program for
programming/erasing
End user procedure
program
Programming/erasing
completed?
No
Yes
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.