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:
Mar. 06, 1990
Filed:
Jun. 16, 1989
Dale E Gulick, Austin, TX (US);
Terry G Lawell, Austin, TX (US);
Charles Crowe, Germantown, TN (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
An integrated data protocol controller (IDPC)(10) is disclosed which includes on a single chip a data link controller (DLC)(52), a universal asynchronous receiver-transmitter (UART)(54) and a dual port timing controller (DPTC)(56). The IDPC is designed to support bit-oriented protocols such as is used in integrated services digital networks (ISDN). A microprocessor interface (50) on the IDPC chip permits a user to control and monitor the IDPC functions via a local microprocessor (18). The IDPC can be connected to a host processor (595) which shares a random access memory (RAM)(22a) with the local processor, allowing interprocessor communication via memory-resident buffers and mailboxes. A set of control and status registers is available within each of the main blocks of the IDPC--the DLC, the UART and the DPTC--to permit user access and control of the respective blocks. The DLC, the UART and the DPTC provide enhanced functions beyond those available in individual chips realizing a DLC, a UART or a DPTC.