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:
Dec. 01, 1998
Filed:
Aug. 13, 1997
James J Walsh, Plano, TX (US);
Weiyuen Kau, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A microcomputer integrated circuit (102) has a central processing unit (CPU) (702) first power management circuit (708) responsive to a system management interrupt (SMI) input for controlling operations of the CPU (702). A card interface integrated circuit (112) is adapted for coupling a card (24) to the microcomputer integrated circuit (102) and has a second power management circuit logic (1620, 1630) that responds to a plurality of interrupt event inputs (in CSC REGs A, B) and concentrates these inputs to a single card system management interrupt output (CRDSMI#). A peripheral processor integrated circuit (110) has a third power management circuit (920) including a plurality of system management interrupt (SMI) sources, and a SMI unit (2370). The SMI unit (2370) has an output (SMI#) connected to the SMI input of the microprocessor integrated circuit. The SMI unit (2370) responds to the card SMI output of the card interface integrated circuit (112) as well as the plurality of SMI sources. The plurality of SMI sources includes timer circuitry (2350) connected to power down terminals (IDEPWR#, FDDPWR#, SIUPWR#, PCSPWR#) for connection to external peripherals upon respective timeouts in the timer circuitry (2350). Other circuits, systems and methods are also described.