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:
Jun. 25, 2002
Filed:
Apr. 29, 1999
Hussein K. Mecklai, Whitehall, PA (US);
Andrew Lawrence Webb, Hamilton, NJ (US);
Agere Systems Guardian Corp., Orlando, FL (US);
Abstract
A method and apparatus for communicating transmit and receive data between a digital signal processor and the baseband processing circuitry in a digital communications station such as a digital cellular telephone. The invention utilizes a transmit buffer and a receive buffer for smoothing out the flow of data. TRANSMIT BUFFER EMPTY and RECEIVE BUFFER FULL interrupts indicating the need for data to be retrieved from the transmit buffer or sent to the receive buffer, respectively, are serviced by a DMA with translation circuitry rather than the DSP. The DMA with translation circuitry intercepts the interrupts and services them by transferring data directly to or from the DSP's RAM without disturbing the DSP. The translation circuitry also arbitrates between TRANSMIT BUFFER EMPTY and RECEIVE BUFFER FULL interrupts so as to service the RECEIVE BUFFER FULL interrupts first since they have stricter timing requirements.