Keypad, particularly a point of sale keypad, and method for placing it into operation and for exchanging and updating firmware of the keypad
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United States of America Patent
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app pub date -
Sep 11, 2006
filing date -
Mar 11, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A keypad, particularly a point of sale keypad, is disclosed that includes a key block, a microprocessor, at least one read-only memory, in which the firmware required for operating the keypad is stored, and at least one interface for connecting the keypad to an external device. Further, a method is disclosed for starting up the keypad and for replacing or updating the keypad firmware. So that it is usually not necessary to open the keypad to replace or update the firmware, the invention proposes providing at least one programmable read-only memory in the keypad, in which a boot program and the firmware are stored in separate memory areas, and in such a way that the first memory area containing the boot program cannot be erased during normal operation of the keypad. In contrast, the second memory area, containing the firmware, of the programmable memory can be electrically erased and rewritten, so that replacing or updating the keypad firmware can occur via the keypad interface externally and thereby without opening the keypad.
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