Registers – Coded record sensors – Particular sensor structure
Patent
1993-04-30
1996-10-01
Hayes, Gail O.
Registers
Coded record sensors
Particular sensor structure
395700, 395500, 235 73, 326 40, 326 41, 371 223, 371 226, 364DIG2, G06F 1100, G06F 738, H01J 300
Patent
active
055617735
ABSTRACT:
A system and circuitry is provided by which certain selected embedded pins of an integrated circuit gate array may be provided with dual functions, that is to say, they may act either as receivers of an externally sourced input signal or as transmitters of an internally generated output signal. Each selected input/output pin is controlled by an associated flip-flop residing in a chain of flip-flops so that an associated flip-flop will determine the condition of two buffer-drivers attached to each input/output pin. While the first buffer-driver is tri-stated (disabled), then the embedded pin operates as an input receiving function. When the first buffer-driver is enabled, the embedded I/O pin operates as the conveyer of an output signal from the internal output logic.
REFERENCES:
patent: 4168796 (1979-09-01), Fulks et al.
patent: 5027011 (1991-06-01), Steele
Microsoft Press, "Computer Dictionary 2nd Edition", 1993, pp. 141-142.
Barajas Saul
Kalish David M.
Whittaker Bruce E.
Axenfeld Robert R.
Hayes Gail O.
Ives Felicia
Kozak Alfred W.
Starr Mark T.
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