Control circuitry for a radio telephone

A control circuitry for a radio telephone transceiver including a transmitter, a receiver, a supervisory unit for providing supervisory signalling between the radio telephone transceiver and a base station, a cradle, and a handset having a pushbutton dial for entering the digits of a telephone number, said control circuitry comprising:

• a first computer having a first read-only memory for storing a first control program and a first read-write memory, said first computer being disposed in the handset, said first computer receiving the entered telephone number, converting the received telephone number to a related coded telephone number and storing the rlated coded telephone number in the first read-write memory;
• a second computer having a second read-only memory for storing a second control program, and a second read-write memory, said second computer being disposed in the cradle;
• a bidirectional data bus having a plurality of data lines for coupling said first computer to said second computer;
• a data-bus control line from said first computer for controlling the direction of data carried on said bidirectional data bus;
• a plurality of first control switches disposed in the handset;
• a plurality of second control switches disposed in the cradle;
• said first computer responsive to an activation of each respective first control switch for providing a predetermined first binary state on said data-but control line for directing data from said first computer to said second computer and coupling a related binary first control code for the respective first control switch to said bidirectional data bus, said second computer responsive to the predetermined first binary state on said data-bus control line and the related binary control code on said bidirectional data bus for providing a corresponding control signal to the supervisory unit;
• and
• said second computer responsive to an activation of each respective second switch for coupling a related binary second control code to said bidirectional data bus in the absence of the predetermined first binary control state on said data-bus control line, said first computer responsive to the related binary second control code for storing the status of the corresponding respective second switch.

A control circuitry for a radio telephone transceiver including a transmitter, a receiver, a supervisory unit for providing supervisory signalling between the radio telephone transceiver and a base station, a cradle and a handset having a pushbutton dial for entering the digits of a telephone number, said control circuitry comprising:

• a first display disposed in the handset for displaying the digits of the entered telephone number;
• a first microcomputer having a first read-only memory for storing a first control program and a first read-write memory, said first microcomputer being disposed in the handset;
• said first microcomputer receiving the entered telephone number, enabling the first display to display the digits of the received telephone number, converting the received telephone number to a related coded telephone number and storing the related coded telephone number in the first read-write memory;
• a second microcomputer having a second read-only memory for storing a second control program, and a second read-write memory, said second microcomputer being disposed in the cradle;
• a bidirectional data bus having a plurality of data lines for coupling said first microcomputer to said second mircocomputer;
• a data-bus control line from said first microcomputer for controlling the direction of data carried on said bidirectional data bus;
• and
• a plurality of first control pushbuttons disposed in the handset, said plurality of first control pushbuttons including a send pushbutton, said first microcomputer responsive to an activation of said send pushbutton for reading out from the first read-write memory the stored related coded telephone number, providing a predetermined first binary state on said data-bus control line for directing data from said first microcomputer to said second microcomputer, initially coupling a related binary first control code for the send pushbutton to said bidirectional data bus and thereafter coupling in succession the digits of the read-out related coded telephone number to said bidirectional data bus, said second microcomputer responsive to the predetermined first binary state on said data-bus control line and the related binary first control code for the send pushbutton on said bidirectional data bus for successively receiving the digits of the related coded telephone number from said bidirectional data bus and outpulsing the received digits of the related coded telephone number to the supervisory unit;
• a plurality of second control pushbuttons disposed in the cradle, said second microcomputer responsive to an activation of reach respective second pushbutton for coupling a related binary second control code to said bidirectional data bus in the absence of the predetermined first binary control state on said data-bus control line, said first microcomputer responsive to the related binary second control code for storing the status of the corresponding respective second pushbutton.