Abstract: A semiconductor package with a heat sink is provided in which at least one chip is mounted on the substrate and covered by a heat sink. The heat sink is formed with a plurality of grooves or holes at positions in contact with the substrate, allowing an adhesive material to be applied between the heat sink and the substrate and filled into the grooves or holes for attaching the heat sink onto the substrate. The adhesive material filled into the grooves or holes provides an anchoring effect for firmly positioning the heat sink on the substrate. Therefore, it is not necessary to form predetermined holes on the substrate for being coupled to fixing members such as bolts, and incorporation of the heat sink would not affect trace routability and arrangement of input/output connections such as solder balls on the substrate and would not lead to cracks of the chip.

Abstract: A wireless keyboard capable of implementing handwriting function is provided. The wireless keyboard comprises a control circuit. The control circuit comprising a switching matrix circuit; a micro-controller connected to the switching matrix circuit, the micro-controller being used to transform data transmitted from the switching matrix circuit into RS-232 codes; two ultrasonic wave receivers for receiving signals transmitted from a ultrasonic wave generator installed in a pen, and then calculating the coordinate of the pen according to time difference; a microprocessor connected to the two ultrasonic wave receivers, the microprocessor being used to transform the data processed by the ultrasonic wave receivers into UART format; and a bluetooth module connected to the micro-controller and the microprocessor, the bluetooth module being used to transmit the UART format data from the micro-controller or the microprocessor to a computer supported by bluetooth system.

Abstract: In a method for fetching instructions in an embedded system, a predicted one of a set of the instructions stored in a memory device is fetched and is subsequently stored in an instruction buffer when a system bus is in a data access phase. When a processor generates an access request for the memory device, the predicted one of the instructions stored in the instruction buffer is provided to the system bus for receipt by the processor upon determining that the predicted one of the instructions stored in the instruction buffer hits the access request from the processor. An embedded system with an instruction prefetching device is also disclosed.

Abstract: A method and apparatus for transmitting registered data onto a PCI bus is provided, which can reduce the delay time of manipulating the outgoing signals without greatly increasing the circuit complexity. The apparatus employee a 2R1W data buffer to send a current phase data and a next phase data one clock cycle ahead of the actual AD activity on PCI bus and use a multiplexer to select the current phase data or the next phase data according to a select signal. The select signal is outputted by a OR gate with IRDY# and TRDY# signals as its inputs. Then, the apparatus use a flip-flop to toggling the output signal of the multiplexer to the PCI bus at the actual AD activity. Therefore, the apparatus of the present invention not only reduce the delay time of manipulating the outgoing signals, but also is implemented with simple architecture.

Abstract: The present invention discloses an apparatus and system for multi-stage event synchronization, whose main object is to eliminate the drawbacks of an expensive synchronization circuit used to balance the data transmissions between an origination agent and a destination agent operating at different frequencies or clock phases as in prior art. The apparatus of the present invention organizes the slower one with multi-stage chains, each of which comprises a simple synchronization circuit and an XOR gate, for receiving the number of events transmitted from the faster one. Therefore, the slower one will not miss the data from the faster one.