To Next Page

To Previous Page

R01UH0823EJ0100 Rev.1.00 Page 1707 of 1823

Jul 31, 2019

RX23W Group 50. Flash Memory (FLASH)

50.9 Flash Memory Protection

Flash memory protection prevents the flash memory from being read or rewritten by the third party.

The boot mode ID code protection is for connecting the serial programmer, and the on-chip debugging emulator ID code

protection is for connecting the on-chip debugging emulator. ROM code protection is for connecting the parallel

programmer.

50.9.1 ID Code Protection

There are two types of ID code protection: Boot mode ID code protection for connecting the serial programmer and on-

chip debugging emulator ID code protection is for connecting the on-chip debugging emulator. The same ID codes are

used for both functions, but operations differ.

ID codes consist of the control code and ID code 1 to ID code 15. Set ID codes to four 32-bit data in 32-bit units.

Figure

50.28

shows the ID Code Configuration.

Figure 50.28 ID Code Configuration

The following shows a program example for setting ID codes.

This is an example when setting the control code to 45h and setting ID codes to 01h, 02h, 03h, 04h, 05h, 06h, 07h, 08h,

09h, 0Ah, 0Bh, 0Ch, 0Dh, 0Eh, and 0Fh (from the ID code 1 field to the ID code 15 field).

C language:

#pragma address ID_CODE = 0xFFFFFFA0

const unsigned long ID_CODE [4] = {0x45010203, 0x04050607,0x08090A0B, 0x0C0D0E0F};

Assembly language:

.SECTION ID_CODE,CODE

.ORG 0FFFFFFA0h

.LWORD 45010203h

.LWORD 04050607h

.LWORD 08090A0Bh

.LWORD 0C0D0E0Fh

Control code ID code 1 ID code 2 ID code 3

ID code 4 ID code 5 ID code 6 ID code 7

ID code 8 ID code 9 ID code 10 ID code 11

ID code 12 ID code 13 ID code 14 ID code 15

FFFF FFA0h

FFFF FFA4h

FFFF FFA8h

FFFF FFACh

31 24 23 16 15 8 7 0

Renesas RX Series User Manual

Questions and Answers: