O2micro International Limited

2micro International Limited

02 Micro International Limited

O.sub.2 Micro, Inc.

Yishao Max Huang

Hyang-Kyun Oh

Richard Brayden

Sterling D Du

James Lam

Jeng-Luen Li

Rajesh B Koilada

Xiaoguang Yu

Haiquan Huang

Reginia K Chan

A global positioning system (GPS) system includes a clock module for providing multiple counter values at multiple time points. The GPS system also includes a system module coupled to the clock module. The system module is capable of obtaining a time value for each time point according to a set of signals from a signal source. The system module is further capable of calculating a set of parameters based on the counter values and the time value for each time point, and determining an estimated time value based on the parameters and a present counter value from the clock module.

Signal acquisition systems with applications of general clocks

A controller includes a plurality of readers for reading an associated plurality of expansion cards and for controlling operation of such expansion cards, wherein at least one of the plurality of readers is a flash media reader. A method for controlling the operation of at least one expansion card with an integrated controller having a plurality of readers includes detecting the presence of at least one expansion card, and enabling a selected reader of the integrated controller associated with at least one expansion card. Another method of writing data to read only memory in an integrated controller includes unlocking the read only memory, writing information into the read only memory, and locking the read only memory to prevent otherwise unintentional or unauthorized writing to the read only memory is also provided.

Integrated PC card host controller for the detection and operation of a plurality of expansion cards

An integrated controller for the detection and operation of both PC Cards, smart cards and passive smart card adapter cards. In one aspect, the invention detects the presence of standard expansion cards or passive smart card adapters by utilizing the reserved detection and voltage selection signal area defined by the PC Card specification. In another aspect, the invention provides an integrated controller that includes logic to operate either a standard expansion card or a passive smart card adapter by reassigning certain PC Card signal lines to operate a standard expansion card or a passive smart card adapter, thereby eliminating the need to provide pins in addition to those defined by the PC Card specification.

Integrated PC Card host controller for the detection and operation of a plurality of expansion cards

A power management PC expansion card controller that includes power on reset circuitry to reset power management enable registers during a reset period, thereby ensuring that the PME registers correctly identify the power management capabilities of the controller. Once the PME registers are reset, an instruction may be provided to change the state of the registers from a default reset state to a state that supports advanced power management capabilities, for example wake-up functions. Additionally, the controller includes blocking circuitry to block conventional reset signals from resetting the power management and proprietary registers if the PME register is instructed to change states, thereby preserving the data contained in the power management and proprietary registers against future reset events. The controller of the present invention supports advanced power management specifications without requiring additional pinout arrangement or reassignment of pin functionality, so that the controller of the present invention can be implemented in current computer system without a the need for retooling or re-layout of system board circuitry and wiring diagrams.

Apparatus for resetting power management enable register and resetting power management register based on an operating system instruction and output of power management enable register

A method and apparatus is disclosed for implementing an integrated video card and smart card reader. A single processor is used to perform both video and smart card reader functions. The processor simulates a PCI-to-PCMCIA detection logic scheme. An operating system, such as Windows, detects both a video card and a PCI-to-PCMCIA bridge. A smart card reader is attached to the integrated video card and smart card reader.

PCI-PCMCIA smart card reader

PC card controller with advanced power management reset capabilities

A PC Card controller, adapted for use in a laptop or notebook computer, generates a fake PC Card-insertion interrupt when a CPU, included in the computer, resumes normal operation after being in a lower power, Suspend operating mode. The PC Card controller includes a host-computer bus-interface adapted for exchanging interrupt signals with a bus included in the host computer. The PC Card controller also includes a PC Card interface-circuit for exchanging digital signals with a PC Card inserted into a PC Card socket included in the host computer. Insertion of a PC Card into the PC Card socket, while the CPU is in its normal operating mode, causes the PC Card interface-circuit to generate an interrupt signal for transmission to the CPU. The PC Card controller also includes a suspend/resume pin that receives a suspend/resume signal generated within the host computer. A fake PC Card-insertion-interrupt generating-circuit, upon detecting a state change in the suspend/resume signal that indicates resumption of normal CPU operation, generates an interrupt signal which simulates insertion of a PC Card into the PC Card socket.

Growing community of inventors

San Jose, CA, United States of America

Yishao Max Huang