Figure 49: Device Setup Window - Security Flag Settings - NEC 78K0/Fx2 User Manual

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78K0/Fx2 – CAN it!

<2> Security flag settings

Disable Chip Erase

Disable Block Erase

Disable Program

Disable Boot block

cluster

reprogramming

[Checksum after Program check box]

If this check box is checked, the flash memory checksum value of the target device is

read from the target device after execution of the Program command and EPV

command.

This value differs from the value displayed in the parameter window of the main

window.

The <Security flag settings> dialog box is used to specify which security function is

valid.

Figure 49: Device Setup Window – Security flag settings

Caution: The following is the correspondence between the [Erase] and

[Program] Commands when the security functions of a 78K0/FF2

microcontroller are valid!

Chip Erase Command

Invalid

Valid

Invalid

Notes 1: Since the [Erase] command is invalid, the data that differs from the

data already written in the flash memory cannot be written.

Notes 2: Valid only for the area other than the area specified as the boot area

Block Erase Command

Invalid

Valid

(Note2)

Program Command

Valid

(Note1)

Valid

Invalid

Valid

(Note2)

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