p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 529

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

(1)
Part of the procedure program that is made by the user, like the download request,
programming/erasing procedure, and determination of the result, must be executed in the on-chip
RAM. The on-chip program that is to be downloaded is all in the on-chip RAM. Note that areas in
the on-chip RAM must be controlled so that these parts do not overlap.
Figure 19.10 shows the area where a program is downloaded.
On-Chip RAM Address Map when Programming/Erasing is Executed
Area where program
is downloaded
(Size: 2 Kbytes)
This area cannot be
used during the
programming/
erasing processing.
Note: * Differs according to the area specified by FTDAR since the on-chip RAM area
Figure 19.10 RAM Map when Programming/Erasing is Executed
in this LSI is split into H'FFD080 to H'FFEFFF and H'FFFF00 to H'FFFF7F.
Initialization + programming program
Programming/erasing program entry
Area that can be used by user*
Area that can be used by user*
Initialization + erasing program
Initialization program entry
(Return value: 1 byte)
<On-chip RAM>
System area
(15 bytes)
DPFR
or
Section 19 Flash Memory (0.18-µm F-ZTAT Version)
Rev. 1.00 Sep. 21, 2006 Page 491 of 658
Address
RAMTOP
FTDAR setting
FTDAR setting + 16
FTDAR setting + 32
FTDAR setting + 2 Kbytes
RAMEND
REJ09B0310-0100