r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 69

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
5.3
Figure 5.1
5.3.1
5.3.2
The ID code area is assigned to certain of the highest addresses for each vector in the fixed vector table,
0FFDFh, 0FFE3h, 0FFEBh, 0FFEFh, 0FFF3h, 0FFF7h, and 0FFFBh.
Figure 5.1 shows the ID Code Area.
The ID code area is used in standard serial I/O mode. Its operation differs depending on whether the 3 bytes in
the reset vector at addresses 0FFFCh to 0FFFEh are FFFFFFh or not.
If the value is not FFFFFFh in standard serial I/O mode, the ID code stored in the ID code area (stored ID code)
and that sent from the serial programmer or the on-chip debugging emulator are examined to see whether they
match. If they match, the commands are accepted. Otherwise, the commands are not accepted. To use the serial
programmer or the on-chip debugging emulator, write predetermined ID codes, in advance, to the ID code area.
If the value is FFFFFFh, the ID codes are not examined and all commands are accepted.
The ID code area is allocated in the flash memory, not in the SFRs. Set appropriate values as ROM data by a
program.
The ID code with the character combination expressed ALeRASE in ASCII is the reserved word for the forced
erase function. The ID code Protect is the reserved word for the standard serial I/O mode disabled function.
Table 5.2 lists the ID Code Reserved Word. When the combination of ID codes and addresses match those listed
in Table 5.2 respectively, the ID codes form the corresponding reserved word. When the forced erase function
or standard serial I/O mode disabled function is not used, use another combination of ID codes.
ID Code Area
Overview
Function
Preliminary document
Specifications in this document are tentative and subject to change.
ID Code Area
0FFDFh to 0FFDCh
0FFEFh to 0FFECh
0FFEBh to 0FFE8h
0FFFFh to 0FFFCh
0FFE3h to 0FFE0h
0FFE7h to 0FFE4h
0FFFBh to 0FFF8h
0FFF3h to 0FFF0h
0FFF7h to 0FFF4h
Address
ID code area
OFS
ID1
ID2
ID3
ID4
ID5
ID6
ID7
Undefined instruction vector
Overflow vector
BRK instruction vector
Address match vector
Single step vector
Watchdog timer, oscillation stop detection,
voltage monitor 1, voltage monitor 2
Address break vector
Reserved area
Reset vector
4 bytes
5. System Control
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