SH7125_08 Datasheet, PDF (632/774 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 17 Flash Memory
(1) On-Chip RAM Address Map when Programming/Erasing is Executed
Parts of the procedure program that are made by the user, like download request,
programming/erasing procedure, and decision of the result, must be executed in the on-chip
RAM. All of the on-chip program that is to be downloaded is in on-chip RAM. Note that on-
chip RAM must be controlled so that these parts do not overlap.
Figure 17.10 shows the program area to be downloaded.
Area to be
downloaded
(Size: 3 kbytes)
Unusable area in
programming/erasing
processing period
<On-chip RAM>
Area that can be
used by user
Address
RAMTOP (H'FFFFA000)
DPFR
FTDAR setting
(Return value: 1 byte)
System use area
(15 bytes)
Programming/
erasing entry
FTDAR setting + 16
Initialization
process entry
FTDAR setting + 32
Initialization +
programming program
or Initialization +
erasing program
Area that can be
used by user
FTDAR setting + 3072
RAMEND (H'FFFFBFFF)
Figure 17.10 RAM Map after Download
Rev. 4.00 Jul. 25, 2008 Page 612 of 750
REJ09B0243-0400