The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2011
Filed:
Mar. 27, 2009
Padakandla Krishna Rao, Kanata, CA;
Arun Munje, Kanata, CA;
Xiaona an, Ottawa, CA;
Research In Motion Limited, Waterloo, Ontario, CA;
Abstract
In a push-to-talk device having two processors where one of the processors is a radio chip and one of the processors is a microprocessor, a method and apparatus for synchronizing the microprocessor and the radio chip includes the steps of checking the status of a radio push-to-talk key on the radio chip when a user push-to-talk button is turned on or off on the microprocessor; if the user push-to-talk button is on and the radio push-to-talk key is off, performing the steps of sending a command to the radio chip to turn on the radio push-to-talk key; and waiting for a response from the radio chip, and if the response indicates the radio push-to-talk key is on, remaining in this synchronized state, otherwise repeating the sending and waiting steps; if the user button is off and the radio push-to-talk key is on, performing the steps of: sending a command to the radio chip to turn off the radio push-to-talk key; and waiting for a response from the radio chip, and if the response indicates the radio push-to-talk key is off, remaining in this synchronized state, otherwise repeating the sending and waiting steps; if the user push-to-talk button is off and the radio push-to-talk key is off, remaining in this synchronized state; and if the user push-to-talk button is on and the radio push-to-talk key is on, remaining in this synchronized state.