Pad input select circuit for use with bond options

Details Pad input select circuit for use with bond options Pad input select circuit for use with bond options

1997-04-04

1999-05-04

Swann, Tod R.

Electrical computers and digital processing systems: memory

Storage accessing and control

Memory configuring

36518902, 36523002, G06F 1200, G11C 700

Patent

active

059000210

ABSTRACT:
A configurable input device for an integrated circuit having a plurality of input pads, the input device including a plurality of buffers, where each buffer is associated with one of the input pads. Each buffer receives a mode select signal and the buffer is responsive to the mode select signal to place the buffer in an enabled mode or a disabled mode. A receiver portion within each buffer is coupled to the associated input pad. The receiver portion pulls the associated input pad to a preselected logic state while the buffer is in the disabled mode. An output driver within each buffer generates an output signal responsive to a signal on the associated input pad while the buffer is in the enable mode and provides a high impedance while the buffer is in the disabled mode. An output node is coupled to the output drivers of the plurality of buffers.

REFERENCES:
patent: 4551634 (1985-11-01), Takahashi et al.
patent: 4825099 (1989-04-01), Barton
patent: 5373470 (1994-12-01), Jones, Jr.
patent: 5406525 (1995-04-01), Nicholes
patent: 5572718 (1996-11-01), Scriber et al.
patent: 5600271 (1997-02-01), Erickson et al.
patent: 5706235 (1998-01-01), Roohparvar et al.
patent: 5757704 (1998-05-01), Hachiya

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