Development Tools

-SECURITY_OPT_BYTE [V1.12 or later]

This option specifies the control value for the security option byte.

[Specification format]

-SECURITY_OPT_BYTE=value

-	Interpretation when omitted

The value specified in an assembly source file or the value defined in the device file is set.

[Detailed description]

-	This option specifies the control value for the security option byte for value.

-	Specify a hexadecimal value in the range from 0x0 to 0xFF for the control value for the security option byte.

-	Specifying a value that cannot be specified for the control value for the security option byte will cause an error.

-	The control value for the security option byte is specified at address 0xC4.

The control value for the security option byte can also be specified by defining the segment with the following relocation attributes in the assembly source file.
Define the segment with 5 bytes in total, including the user option bytes and on-chip debugging control value starting from address 0xC0.

        .section    .option_byte, opt_byte

          .db       0xfd                ;Address 0xC0

          .db       0xfe                ;Address 0xC1

          .db       0xff                ;Address 0xC2

          .db       0x04                ;Address 0xC3

          .db       0xff                ;Address 0xC4

-	If the assembly source file and this option are specified at the same time, this option takes priority.

-	If the device file, the assembly source file, and this option are specified at the same time, this option takes priority.

[Example of use]

-	To set 0xC4 at address 0x04 as the control value for the security option byte, describe as:

>rlink a.obj b.obj -device=dr7f124fgj.dvf -security_opt_byte=04

[Remark]

-	If the -form={object\|relocate\|library} option or -extract option is specified, this option will be invalid.

-	If the -device option is not specified, this option will be invalid.

-	When specifying the security ID value in the assembly source file, do not use a label reference. Doing so might result in an unexpected value due to relocation resolution.