IBM MaxLoader manual Device / Data Compare, Device / Erase, Device / Security

MaxLoader User’s Guide

Device / Data Compare

Compares the data in device to the data in buffer and saves any difference into the COMPARE.TXT file. When you have a verify error during the Verify operation, the Data Compare command will be useful. It will detect a difference between the device content and the buffer content and will write the difference into the COMPARE.TXT file under the MaxLoader (TopMax/TopMax 8Gang/ChipMax) directory. You may view the file using edited utility software.

Device / Erase

This option erases the data in your socket before programming it. This operation is valid for only limited devices such as EEPROM, Flash Memory, GAL, PEEL devices. EPROMs that have a window should be erased by UV EPROM erasers externally (see NOTE “Erasing EPROMs” in this manual).

Device / Security

Secure a PLD or Microcontroller so that their content can no longer be examined or modified. Security is confirmed when valid data can no longer be read or verified against a previously read pattern. To ensure that the security fuse has been blown, the Security operation is preceded by a “read” of the device and followed by a “verify.” Securing a device prevents the programmed data pattern into the device from unauthorized access. This command appears only when the selected device supports it. Some Microcontrollers 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.

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