Jeffery A Floyd

US Patent:

54143802, May 9, 1995

Filed:

Apr 19, 1993

Appl. No.:

8/047895

Inventors:

Jeffery A. Floyd - Round Rock TX
Lloyd P. Matthews - Buda TX

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H03K 19003

US Classification:

327198

Abstract:

An integrated circuit (20) configures the active level of an input, output, or input/output pin by sensing a logic state on the pin's bonding pad (21) at the inactivation of a reset signal, such as a power-on reset signal. The integrated circuit (20) selects a true or complement signal to provide to or from an internal circuit (25). The voltage level on the pin is latched on the active-to-inactive transition of the power-on reset signal. Thus, the use of proper board-level termination resistors (70, 71) programs the pins to the desired active logic level without the need for additional logic circuitry or a dedicated device pin.