Back to results
US 4,717,912 AGranted
Apparatus for producing any one of a plurality of signals at a single output
AssigneeAdvanced Micro Devices, Inc.
InventorsPaul W. Harvey, Bradford S. Kitson, Warren K. Miller, Jr.
Life of this patent
Estimating the term…
Abstract
An integrated circuit package having a plurality of pins and a plurality of output structures connected, respectively, to the plurality of pins. Each output structure selectively provides any one of four signals including a registered signal, non-inverted or inverted, or a non-registered signal, non-inverted or inverted, to a pin. Each output structure is configurable or field-programmable by a user or purchaser of the package to provide it with any desired combination of registered and non-registered outputs.
Claims35
An output structure for connection between a logic circuit producing a logic signal and a pin of a package, comprising:
- (a) first means, responsive to the logic signal, for providing a stored non-inverted first signal;
- (b) second means, responsive to the logic signal, for providing a non-stored non-inverted second signal;
- (c) first programmable means for coupling therethrough said first signal or said second signal;
- (d) third means, having an output connectable to the pin, for providing at said output said coupled first signal or said coupled second signal or a third signal being inverted of said coupled first signal or a fourth signal being inverted of said coupled second signal;
- and
- (e) second programmable means for controlling said third providing means to provide at said output said coupled first signal or said coupled second signal or said third signal or said fourth signal.
3 more elements
A chip part for connection to a plurality of pins, comprising a plurality of output structures each having a single output connectable, respectively, to one of said plurality of pins, each of said plurality of output structures further including
- (a) a storage register having a first input and a first output Q;
- (b) a multiplexer having a second input connected to said first output Q, a third input connected to said first input and a second output;
- (c) a first burnable fuse connected to said multiplexer to control the connection of said second input or said third input to said second output;
- (d) an exclusive-OR gate having one input connected to said second output, another input and said single output;
- and
- (e) a second burnable fuse connected to said other input of said exclusive-OR gate to control the non-inversion or inversion of a signal on said one input of said exclusive-OR gate.
3 more elements
An integrated circuit package, comprising:
- (a) a logic circuit for producing a plurality of logic signals;
- (b) a plurality of pins;
- and
- (c) a plurality of programmable output structures each having an input and an output being connected, respectively, between said logic circuit and one of said plurality of pins, each of said plurality of output structures being able to produce on said output, in response to one of said logic signals on said input a stored signal, inverted or non-inverted, or a non-stored signal, inverted or non-inverted, to one of said plurality of pins, said plurality of output structures each including
- (i) first means for selecting said stored signal, or said non-stored signal;
- and
- (ii) second means for selecting the polarity, inverted or non-inverted, of said stored signal or said non-stored signal.
4 more elements
A circuit package, comprising:
- (a) a logic circuit for producing a plurality of logic signals;
- (b) a plurality of pins;
- and
- (c) a plurality of output structures coupled between said logic circuit and said plurality of pins, respectively, each of said output structures including
- (i) an input coupled to said logic circuit and receiving one of the logic signals;
- (ii) an output coupled to one of said pins;
- (iii) means, responsive to the logic signal on said input, for providing a stored non-inverted first signal and a non-stored non-inverted second signal and an inverted third signal of said first signal and an inverted fourth signal of said second signal;
- and
- (iv) means for selecting said first signal or said second signal or said third signal or said fourth signal as an output signal on said output.
6 more elements
A circuit package, comprising:
- (a) a logic circuit for producing a plurality of logic signals;
- (b) a pluraltiy of pins;
- and
- (c) a pluraltiy of output structures coupled between said logic circuit and said pluraltiy of pins, respectively, each of said output structures including:
- (i) an input coupled to said logic circuit and receiving one of the logic signals;
- (ii) an output coupled to one of said pins;
- (iii) means, responsive to the logic signal on said input, for providing a stored non-inverted first signal or a non-stored non-inverted second signal or an inverted third signal of said first signal or an inverted fourth signal of said second signal;
- and
- (iv) means for selecting said first signal or said second signal or said third signal or said fourth signal as an output signal on said output.
6 more elements
An integrated circuit package, comprising:
- (a) a logic circuit for producing a plurality of logic signals;
- (b) a plurality of pins;
- and
- (c) a pluraltiy of programmable output structures each being connected, respectively, between said logic circuit and one of said pins, each one of said plurality of output structures being programmable to provide, in response to one of said plurality of logic signals, a stored non-inverted first signal or a non-stored non-inverted second signal or an inverted third signal of said first signal or an inverted fourth signal of said second signal to a corresponding one of said plurality of pins, each of said plurality of output structures including
- (i) data storage means for storing said stored non-inverted first signal and a fifth signal being inverted of said stored non-inverted first signal;
- and
- (ii) programmable means for feeding back to said logic circuit said fifth signal or any one of said first through fourth signals provided to said one of said plurality of pins.
4 more elements
An integrated circuit package, comprising:
- (a) a logic circuit for producing a plurality of logic signals;
- (b) a plurality of programmable output structures each having an input and an output being connected, respectively, between said logic circuit and one of said plurality of pins, each of said plurality of output structures being able to produce on said output in response to one of the logic signals on said input, a stored signal, inverted or non-inverted, or a non-stored signal, inverted or non-inverted, to one of said plurality of pins, and each of said plurality of output structures being programmable to provide said stored signal, inverted or non-inverted, or said non-stored signal, inverted or non-inverted, so that a combination of said plurality of output structures for the integrated circuit package can be provided to output to said pluraltiy of pins a combination of stored signals, inverted and non-inverted, and non-stored signals, inverted and non-inverted.
An integrated circuit package, according to claim 32, wherein said programmable means comprises a pair of burnable fuses, each of said burnable fuses being individually burnable.
Dependencies are inferred from the claim text.