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8. KEY file
Some MCU has a security feature.
With the basic security feature, an encrypted data (ID code), embedded in the MCU, is sent from the
programmer when the programmer accessing (read/write) the MCU, and the access will be failed if the data is
not matched. Therefore the flash memory can be accessed only when the programming contents are obvious.
By this way, it can prevent the wrong data programming and reading.
NETIMPRESS air creates KEY file with an encrypted data (ID code) for passing the security at programming.
KEY file
This is a file for checking the security by issuing the ID code to device
automatically when the programmer executed the target function.
Security ID address, ID size and ID data value are stored.
KEY file has to be in the YIM folder. Download this file by using AZ990 (air
Connect) as a bundle-file.
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For details on how to download the bundle-file, see Chapter 4.3.3 Downloading the Bundle Files.
Specification of security varies depending on the MCU. For details, see the manuals of definition
program and Micom-pack.
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