| 摘要 |
In an electronic apparatus, for example, a programmable calculator, a portable or handheld computer, a memory module, or a data collector, incorporating a battery backup RAM, the present invention provides means for first checking the memory contents when the power-OFF command has been activated, and then causes the results of the checking to be stored in a specific area of the RAM. When the memory contents checking command has been activated, the system rechecks the memory contents to see if the memory contents have varied. The invention securely confirms whether the memory contents of either the effective programs or data have been correctly backed up when either replacing the battery or during storage of an electronic apparatus that uses the battery backup RAM. This is particularly effective for portable or handheld programmable computers.
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