Programmable output buffer and method for programming

Details Programmable output buffer and method for programming Programmable output buffer and method for programming

1996-04-02

1998-09-08

Westin, Edward P.

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 38, 326 83, 326 81, H03K 190175, H03K 738

Patent

active

058049851

ABSTRACT:
The present invention provides an output buffer on a monolithic integrated circuit with programmability, such that one of sixteen output configurations is selected for providing the proper signaling interface to peripheral devices. An input signal (SELECT) in selector circuit (12) provides the transfer of one of two sets of input data signals into function control circuit (14). With the input signal (EN) applied, control signals in the function control circuit (14) set the configuration mode for the output buffer circuit (16). The data input signal INPUT DATA, in accordance with the programmed configuration mode for the output buffer circuit (16), transitions the output signal, DBOUT. The output buffer circuit (16) is programmable for providing an open-drain output, a tri-stated output, a high current output, a low current output, a PCI output, and an output selected from two operating voltages for signal level translation functions.

REFERENCES:
patent: 3979730 (1976-09-01), Bennett et al.
patent: 5217211 (1993-06-01), Tang et al.
patent: 5233241 (1993-08-01), Nishimori
patent: 5336950 (1994-08-01), Popli et al.
patent: 5394034 (1995-02-01), Becker et al.
patent: 5469082 (1995-11-01), Bullinger et al.
patent: 5489862 (1996-02-01), Risinger et al.
The PCI Bus Monitor, Q4 '95, (four pages).

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