SH7055S Datasheet, PDF (781/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

22.2.6 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 registers/parameters.
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 22.5.2, 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 VBR,
FKEY, and SCO bits.
Initialization execution
(on-chip program execution)
Programming (in 128-byte
units) or erasing (in
one-block units)
(on-chip program execution)
No
Programming/
erasing
completed?
Yes
End user procedure
program
Figure 22.5 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 registers. The download destination can be specified by
FTDAR.
Rev.2.0, 07/03, page 743 of 960