Combined transmitter/receiver integrated circuit with learn mode

• US 5,471,668 A
• Filed: 06/15/1994
• Issued: 11/28/1995
• Est. Priority Date: 06/15/1994
• Status: Expired due to Term

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Adkins, Thomas, Soenen, Eric G., Davis, Gregory B., MacDonald, Russell K.
• Primary Examiner(s): Nguyen, Viet Q.
• Application Number:
  US08/259,819
• Time in Patent Office: 531 Days
• Field of Search: 455/351, 455/352, 455/151.2, 455/152.1, 455/252.1, 455/333, 341/176, 340/825.72, 340/539, 327/564, 342/195, 342/198
• US Class Current: 455/352
• CPC Class Codes: G07C 2009/00769 with data transmission performed by wireless means
• CPC Class Codes: G07C 2009/00825 remotely by lines or wireless communication
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00817 where the code of the lock can be programmed
• CPC Class Codes: H04B 1/202 by remote control

Abstract

An integrated circuit configurable as a transmitter/receiver includes learn capabilities that allows a receiver IC to memorize the identification pattern of a specific transmitter.

Claims

1. An integrated circuit configurable as a transmitter and configurable as a receiver, comprising:

a configuration pin to which one voltage may be applied to configure the integrated circuit as a transmitter and to which another voltage may be applied to configure the integrated circuit as a receiver;

an bidirectional input/output pin for the transmission of data when the integrated circuit may be configured as a transmitter and for the reception of data when the integrated circuit may be configured as a receiver; and

circuitry coupled to the configuration pin and the bidirectional input/output pin having a program that allows the integrated circuit to learn an identification code of a transmitter when the integrated circuit may be configured as a receiver.

2. The integrated circuit of claim 1 wherein the circuitry includes a microcontroller.

3. The integrated circuit of claim 1 wherein the bidirectional input/output pin is a serial data pin and further including a plurality of bidirectional parallel data pins.

4. A remote access system, comprising:

a transmitter device containing an integrated circuit chip;

a receiver device containing the same integrated circuit chip as the transmitter; and

wherein the integrated circuit chip may be placed into a learn mode so that it can learn an identification code produced by the transmitter device.

5. The remote access system of claim 4 wherein the integrated circuit chip is placed into the learn mode by applying a voltage to a programming terminal.

6. The remote access system of claim 5 wherein the integrated circuit chip contains a configuration terminal to which one voltage is applied to cause the integrated circuit chip to perform as a transmitter and to which another voltage is applied to cause the integrated circuit chip to perform as a receiver.

7. The remote access system of claim 6 wherein the integrated circuit chip contains pins that are bidirectional so that data may be transmitted therefrom when the one voltage causes the integrated circuit chip to perform as a transmitter and that data may be received thereon when the another voltage causes the integrated circuit chip to perform as a receiver.