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:
Jan. 07, 2003
Filed:
Dec. 10, 1999
Takayuki Nakashima, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
An IrDA modulation/demodulation integrated circuit device modulates and demodulates a signal by an IrDA-complying method that meets the SIR standards. The IrDA modulation/demodulation integrated circuit device has a CRC block for performing calculation on data consisting of A, C, and I fields to calculate an FCS and appending an FCS field to the data, a data transparency control block for performing data transparency control for transmission on the data output therefrom, and a flag block for adding a BOF flag and an EOF flag at the head and the tail, respectively, of the data obtained therethrough. The IrDA modulation/demodulation integrated circuit device also has a flag block for removing the BOF and EOF flags from a demodulated signal, a data transparency control block for performing data transparency control on the basis of the data output therefrom, and a CRC block for checking for a transfer error by checking the value in the FCS field.