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US 2001/0054971 A1Published application
Prevention of incompatible keyboard selections from being entered during power initialization
AssigneeThomson Licensing
InventorDale Wayne King
Life of this patent
Estimating the term…
Abstract
A control system for an apparatus wherein a keyboard for user selection has a plurality of first lines and a plurality of second lines coupled to a programmable microprocessor. The keyboard includes a plurality of switch elements arranged to selectively connect a particular one of the plurality of first lines to a particular one of the set of second lines. The control system is disabled while powering-up so that incompatible keyboard selections cannot be entered by the user.
Claims8
A control system for an apparatus comprising:
- a keyboard having a plurality of first lines and a plurality of second lines coupled to a programmable microprocessor;
- the keyboard including a plurality of switch elements arranged to selectively connect a particular one of the plurality of first lines to a particular one of the set of second lines;
- the control system being disabled during powering-up of the apparatus by the programming of the microprocessor.
A control system comprising:
- a keyboard for user selection and having a plurality of first lines and a plurality of second lines coupled to a programmable microprocessor;
- the keyboard including a plurality of switch elements arranged to selectively and electrically connect a particular one of the plurality of first lines to a particular one of the set of second lines;
- at least one switch element providing a selection during powering-up which is incompatible with other user selections;
- the control system being disabled during powering-up so that the incompatible keyboard selection cannot be entered by the user.
1 more element
A control system comprising:
- a keyboard for user selection and having a plurality of first lines and a plurality of second lines coupled to respective terminals of a programmable microprocessor;
- the keyboard including a plurality of switch elements, at least one switch element arranged to selectively connect a particular one of the plurality of first lines to a particular one of the set of second lines;
- the control system being disabled while powering-up so that incompatible keyboard selections cannot be entered by the user because the microprocessor is programmed to configure one of the first lines and the second lines to be output lines during power-up.
A control system comprising:
- a keyboard having a plurality of first lines and a plurality of second lines coupled to respective terminals of a programmable microprocessor;
- the keyboard including a plurality of switch elements, at least one switch element arranged to selectively connect a particular one of the plurality of first lines to a particular one of the set of second lines;
- one of the first lines and the second lines being configured as output lines during power-up and configured as input lines after power-up.
Dependencies are inferred from the claim text.