Browse Prior Art Database

AUTO RADIO WAKE UP

IP.com Disclosure Number: IPCOM000006151D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Dec-07
Document File: 2 page(s) / 84K

Publishing Venue

Motorola

Related People

Blake Moselle: AUTHOR

Abstract

A hardware timer circuit connected to a radio's main power would allow the radio to be powered up periodically when the physical power switch is in the off position. This timer with the addition of some software and a hardware line connected to an I/O port on the radio's main processor would allow a system access to a radio and its features, such as Radio Inhibit, with a minimum of current loss at any time a good battery was connected to the radio and the radio was in range of a system.

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Page 1 of 2

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MOTOROLA INC. Technical Developments 'Volume 12 April 1991

AUTO RAtjlO WAKE UP ~

by Blake Moselle

  A hardware timer circuit connected to a radio's main power would allow the radio to be powered up periodically when the physical power switch is in the off position. This timer with the addition of some software and a hardware line connected to an I/O port on the radio's main processor would allow a system access to a radio and its features, such as Radio Inhibit, with a minimum of current loss at any time a

good battery was connected to the radio and the radio was in range of a system.

  This would be accomplished by powering up a radio periodically with a 555 Timer and powering down the radio with the 555 Timer discharge line connected to an I/O port on the radio's main processor when the power switch is in the off position. The basic hardware timer circuit could be as follows:

m Ground 13 Radio Main A p-..-~

' Power

Y

Radio Reset

eset ound D..r.,.-. uaur;,y I

+

vcc /\

555 Timer

1 TCw o& r-d -

Discharg

b

Y-l A*

Radio Switch

e

Main Processor

Radio Main Power

Port I/o

166

[This page contains 15 pictures or other non-text objects]

Page 2 of 2

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MOlYlROLA INC. Technical Developments Volume 12 April 1991

  When the radio is powered up by its timer circuit it would have the ability to affiliate on a Trunked System or send in a Radio Check on a Conventional System to notify the system of its presence. Once the system is notified that the radio has at least returned to operation for some period of time the system could perform any function pending for that radio. The radio would also have the option of powering up and waiting idle for some specified period of time for any system information directed specifically to the ra...