Samsung Electronics Co., Ltd.

Dong-Sik Cho

Jin-Ook Song

Yun-Ju Kwon

Byung-Tak Lee

A system on chip (SoC) adjusts power of a memory through a handshake. The SoC includes a memory controller and a power manager. The memory controller is configured to control a memory. The power manager is configured to manage a supply power level of the memory. The memory controller is configured to output, to the power manager, a memory access level indicating a frequency of accesses to the memory. The power manager is configured to adjust the supply power level of the memory according to the memory access level.

System on chip controlling memory power using handshake process and operating method thereof

An apparatus includes a first function module providing a master signal, a second function module providing a comparison signal, and safety logic. The safety logic includes a toggle signal generator having a comparator providing a comparison result in response to the master signal and the comparison signal, a feedback path generating a first toggle signal in response to the comparison result and providing a feedback signal to the comparator, and a first multiple input gate generating a second toggle signal in response to the comparison result. The safety logic also includes a toggle signal monitor providing a final fault search signal in response to the first toggle signal and the second toggle signal.

Apparatus including safety logic

A wireless communication method capable of preventing communication interference and cut-off in one-to-multi wireless communication. The wireless communication method has the steps of: determining as to whether communication parameters satisfy a precondition for communication before a master device communicates with a slave device in a corresponding mode, the communication parameters being required for the slave devices to communicate with the master device, the precondition being that the slave devices should communicate with the master device without overlapping of communication time thereof; controlling the communication of the slave devices according to the corresponding mode by differently setting operation information of the slave devices according to the corresponding mode, when determining that the communication parameters satisfy the precondition for communication; and maintaining a connection between the slave device and the master device until the communication completes, when the time of operation of the slave devices ends due to the corresponding mode shift when the communication is not completed between the master device and the slave device. Accordingly, the interference and cut-off of communication with the slave devices of different communication times and cycles in corresponding mode can be prevented.

Wireless communication method for preventing communication interference and cut-off in one-to-multi wireless communication

Disclosed is a communicating method capable of preventing data collision for a Bluetooth system which communicates with a plurality of other Bluetooth systems on a scatternet. The communicating method of a Bluetooth system comprises the steps of: receiving a communication request signal from a second external device; scanning the received communication request signal to convert the operation of the Bluetooth system from as the master to the first external device into as a slave to the second external device; and transmitting a mode-converting request signal into the second external device to convert the link state of the Bluetooth system with the second external device into a sniff mode in converting the operation of the Bluetooth system from as the slave to the second external device into as the master to the first external device. As converting the link state with the second external device into the sniff mode while operating as the master to the first external device, the Bluetooth system can execute efficient data communication with the plurality of other Bluetooth systems on the scatternet.

Bluetooth system capable of communicating on scatternet and communicating method thereof

Method and apparatus for detecting 50 Hz GPS data-bit boundaries and detecting satellite-signal reception. The apparatus includes a correlating unit and a data-bit boundary detecting unit. The correlating unit outputs first (I) correlation integral values and second (Q) correlation integral values sequentially by calculating a correlation integrals between a satellite pulse train and a replica PN code. The data-bit boundary detecting unit changes the sign of each of the first (I) correlation integral values and second (Q) correlation integral values, based on comparing each of the first and second correlation integral values with an immediately previously outputted (first or second, respectively) correlation integral value, and generates data-bit boundary detection signals having information corresponding to the data-bit boundary using the changed correlation integral values. Thus, the data-bit boundary in GPS satellite signals can be detected.

Method and apparatus for detecting GPS data-bit boundaries and detecting GPS satellite-signal reception

The invention is directed to an apparatus and method for determining or estimating position using GPS signals. The system includes a receiver such as a GPS receiver for receiving GPS signals and a processor for determining position from the received GPS signals. The receiver receives a first GPS signal from a first GPS satellite at a first position of the first GPS satellite. A second GPS signal is received by the receiver from the first GPS satellite at a second position of the first GPS satellite. Position of the receiver is determined using the first and second GPS signals. Time differences between the two signals can be determined and used in calculating position.

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Suwon-si, South Korea

Dong-Sik Cho