Under development
Preliminary specification
Specifications in this manual are tentative and subject to change.
R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,
R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group
13. ID Code Areas
13.2
Functions
The ID code areas are used in standard serial I/O mode. Unless 3 bytes (addresses 0FFFCh to 0FFFEh) of the reset
vector are set to FFFFFFh, the ID codes stored in the ID code areas and the ID codes sent from the serial
programmer or the on-chip debugging emulator are checked to see if they match. If the ID codes match, the
commands sent from the serial programmer or the on-chip debugging emulator are acknowledged. If the ID codes
do not match, the commands are not acknowledged. To use the serial programmer or the on-chip debugging
emulator, first write predetermined ID codes to the ID code areas.
If 3 bytes (addresses 0FFFCh to 0FFFEh) of the reset vector are set to FFFFFFh, the ID codes are not checked and
all commands are accepted.
As the ID code areas are allocated in the flash memory (not in the SFRs), they cannot be rewritten by executing an
instruction. Write appropriate values when creating a program.
The character sequence of the ASCII codes “ALeRASE” is the reserved word used for the forced erase function.
The character sequence of the ASCII codes “Protect” is the reserved word used for the standard serial I/O mode
disabled function. Table 13.1 shows the ID Code Reserved Word. The reserved word is a set of reserved characters
when all the addresses and data in the ID code storage addresses sequentially match Table 13.1. When the forced
erase function or standard serial I/O mode disabled function is not used, use another character sequence of the
ASCII codes.
Table 13.1
ID Code Reserved Word
ID Code Storage Address
0FFDFh
0FFE3h
0FFEBh
0FFEFh
0FFF3h
0FFF7h
0FFFBh
ID1
ID2
ID3
ID4
ID5
ID6
ID7
lD Code Reserved Word (ASCII)
ALeRASE
Protect
41h (upper-case “A”)
50h (upper-case “P”)
4Ch (upper-case “L”)
72h (lower-case “r”)
65h (lower-case “e”)
6Fh (lower-case “o”)
52h (upper-case “R”)
74h (lower-case “t”)
41h (upper-case “A”)
65h (lower-case “e”)
53h (upper-case “S”)
63h (lower-case “c”)
45h (upper-case “E”)
74h (lower-case “t”)
Note:
1. Reserve word:
A set of characters when all the addresses and data in the ID code storage addresses sequentially
match Table 13.1.
REJ09B0441-0010 Rev.0.10
Page 203 of 809
Jul 30, 2008
RENESAS [ RENESAS TECHNOLOGY CORP ]
