IBM MaxLoader manual Device / Encryption, Device / Option

MaxLoader User’s Guide

NOTE: When you click on OPTION, device security mode and option fuses will be available for certain manufacture devices. Selecting these options, programmer will program your device with the checked options continuously. It is a useful feature for users who like to program devices in volume quantities. The user does not have to set the fuses or security modes for every programming.

CAUTION: Some devices, such as Philips P89C52, can pass the BLANK CHECK routine after they are secured. Securing a device separates the programmed data pattern from unauthorized access. This command appears only when the selected device supports it. Some Microcontroller’s and PLDs can be secured by programming a special address location. The security bit will be cleared when the device is erased. Once a device is secured, it cannot be unsecured to read, verify, or duplicate. Also the secured device is seen as a blank chip even though it is not actually blank.

Device / Encryption

The encryption table is a feature of the 87C51/87C52 family Microcontroller devices. The Encryption array of the Microcontroller is initially unprogrammed (all '1's). In order to protect the code from being easily read by anyone other than the programmer, this feature allows you to program the encryption table that is exclusive NO Read with the program code data as it is read out. You have to know its content in order to correctly decode the program code data. Thereafter you will have to use the same displayed encryption array any time you need to read back the device.

Device / Option

In most Microcontrollers, there are several option bits (or fuses) in order to secure Microcontroller devices. Customer should understand how to set these bit (fuses) after reviewing data sheet. This option fuses can be either loaded though a file or entered by manually.

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