Method for processing a ROM image when electrical power supplied to a laser printer has been interrupted
AssigneeSamsung Electronics Co., Ltd.
InventorHo-sung Han
Life of this patent
Estimating the term…
Abstract
In a technique for processing a ROM image when supplying of electrical power to a laser printer has been interrupted during the downloading of the ROM image to a flash memory, if the ROM image is abnormally downloaded to the flash memory, the ROM image can be loaded into the flash memory again. Accordingly, although the ROM image is abnormally loaded into the flash memory in the laser printer, it is possible to normally use the laser printer.
Claims28
A method for processing a ROM image when supplying of electrical power to a laser printer has been interrupted, comprising the steps of:
- detecting a check word in each program region of a flash memory in the laser printer;
- checking whether or not the ROM image has been normally recorded in each program region based on the check word;
- setting an operation mode of the laser printer to a normal mode when it has been determined that the ROM image has been normally recorded in each program region;
- setting the operation mode of the laser printer to a down load mode when it has been determined that the ROM image has been abnormally recorded in each program region due to the interruption of supplying electrical power to the laser printer during a downloading of the ROM image;
- and
- loading the ROM image into the flash memory according to states of the ROM image when the operation mode is set to the downloading mode.
An apparatus for processing a ROM image when supplying of electrical power to a laser printer has been interrupted, comprising:
- a detector for detecting a check word in each program region of a flash memory in the laser printer;
- a checking means for checking whether or not the ROM image has been normally recorded in each program region based on the check word;
- a setting means for setting an operation mode of the laser printer to a normal mode when it has been determined that the ROM image has been normally recorded in each program region;
- said setting means setting the operation mode of the laser printer to a down load mode when it has been determined that the ROM image has been abnormally recorded in each program region due to the interruption of supplying electrical power to the laser printer during a downloading of the ROM image;
- and
- a loading means for loading the ROM image into the flash memory according to states of the ROM image when the operation mode is set to the downloading mode.
Dependencies are inferred from the claim text.