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Cellular telephone with keypad controller

  • US 5,247,565 A
  • Filed: 10/21/1991
  • Issued: 09/21/1993
  • Est. Priority Date: 05/10/1989
  • Status: Expired due to Fees
First Claim
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1. Cellular telephone apparatus having a plurality of operating modes and being operable on cellular radio channels, and cellular telephone apparatus comprising:

  • a data bus having first and second ports;

    a transceiver including a first microcomputer for controlling the operating modes and communicating cellular telephone calls on the cellular radio channels;

    a controller having a plurality of keys including ten numerical keys for entering telephone numbers and including a memory key for controlling the operating modes of the cellular telephone apparatus;

    a second microcomputer including a memory and being coupled to the controller for detecting activations of individual keys to receive telephone number digits and for detecting concurrent activations of predetermined key sequences to select a corresponding one of the operating modes, the predetermined key sequences including the memory key and another key, said second microcomputer storing each received digit in the memory, and said second microcomputer further being coupled to the first port of said data bus for automatically transmitting the stored digits or the selected one of the operating modes to the cellular transceiver when the elapsed time from detection of the last activated key exceeds a predetermined time interval; and

    said first microcomputer coupled to the second port of said data bus for receiving the selected one of the operating modes and applying the received operating mode to the cellular transceiver, and receiving the transmitted digits and automatically transmitting the received digits on one of the cellular radio channels to originate a telephone call, whereby all dialed digits of each telephone number are automatically transmitted when dialing is interrupted for at least the predetermined time interval.

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