Tristate startup operating mode setting device

Details Tristate startup operating mode setting device Tristate startup operating mode setting device

2007-04-24

2007-04-24

Barnie, Rexford (Department: 2819)

Electronic digital logic circuitry

Tri-state

C326S030000, C326S033000

Reexamination Certificate

active

11169501

ABSTRACT:
A tristate operating mode setting device is proposed, which is designed for use with an electronic circuit unit for providing the electronic circuit unit with a tristate operating mode setting function, and which is characterized by the utilization of a specially-designed logic circuit and logic control signal generator to allow the electronic circuit unit to be selectively set to one of three different operating modes during startup through a connecting pad that can be externally connected in three different ways. This feature allows one single pad for the provision of three different operating mode settings, whereas prior art is only capable of providing two different settings. The electronic circuit unit is therefore able to use fewer number of pads to provide an increased number of operating mode settings, with the benefit of reducing layout space on circuit board.

REFERENCES:
patent: 5298800 (1994-03-01), Dunlop et al.
patent: 5731711 (1998-03-01), Gabara
patent: 6985009 (2006-01-01), Nishio et al.
patent: 7116129 (2006-10-01), Pan et al.

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