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:
Apr. 03, 2001
Filed:
Oct. 09, 1998
Ignatius Tjandrasuwita, Union City, CA (US);
Mediaq Inc., Santa Clara, CA (US);
Abstract
A programmable Power Management Unit (PMU) is provided. The Power Management Unit (PMU) supports a number of different power states namely a normal power state, a software-controlled sleep power sate, a hardware-controlled sleep power state, and two register programmable power states. In the normal power state, all circuits in the integrated circuit (e.g., graphics/display controller) are enabled. In the software-controlled sleep power state, all circuits in the integrated circuit are disabled except for frame buffer memory refresh logic and part of the bus interface. In the hardware-controlled sleep power state, all circuits in the integrated circuit are disabled except for the memory interface logic. In the two register programmable power states, circuits can be selectively powered up or down as desired in a single power sequencing. Moreover, under the present invention, the interval between circuits that are being disabled or enabled in a power sequencing is also programmable.