Abstract:
PURPOSE: A line interface module in a router and a routing system having the same are provided to integrate many line interfaces into a single line interface module and to execute fault management, inter-processor connection, switch interfacing, etc., through the line interface module. CONSTITUTION: A line interface module(10) consists of a sub switching card(13) and a backplane(14). The sub switching card(13) comprises line cards(11,12), a sub switch(131), and switch input-output buffers(133,134). The backplane(14) connects between the line cards(11,12) and the sub switching card(13). Each line card(11,12) comprises physical link ports(111,114,121,124), physical layer interface parts(112,15,122,125), and network processors(113,116,123,126). The network processors(113,116,123,126) process the packet switching and forwarding function of an OSI(Open System Interconnection) 3/4+ layer. The sub switch(131) executes sub switching to target data channels for the data supplied from the line cards(11,12) and the switch input-output buffers(133,134). The switch input-output buffers(133,134) buffer the data inputted/outputted between the switch of a routing system and the sub switch(131).
Abstract:
PURPOSE: A two-stage ring voltage controlling oscillator by using a couple of variable delay elements is provided to carry out the function as a voltage controlling oscillator even if accuracy, security and reappearance in the manufacturing progress aren't outstanding. CONSTITUTION: A two-stage ring voltage controlling oscillator by using a couple of variable delay elements includes the first analog mixer(321), the fist variable delay element portion(33), the first, M-delay or reversing element(323), the second, M-delay or reversing element(322), the second analog mixer(331), the second variable delay element portion(33), the second M-delay or reversing element(333) and the second, first delay or reversing element(332). In the first analog mixer(321) of the fist variable delay element portion(33) inputs the output of the first, M-delay or reversing element(323) and output of the second, M-delay or reversing element(322) and mixes them with analog and outputs them with the input of the first, first delay or reversing element(322). The first, first delay or reversing element(322) and the first, M-delay or reversing element(323) generate the delayed or reversed signal with adding the amplitude of the input signal. The second analog mixer(331) of the second variable delay element portion(33) inputs the output of the second M-delay or reversing element(333) and output of the second, M-delay or reversing element(332) and mixes them with analog and outputs them with the input of the second, first delay or reversing element(332). The second, first delay or reversing element(322) and the second, M-delay or reversing element(333) generate the delayed or reversed signal with adding the amplitude of the input signal.
Abstract:
직렬 인터페이스를 통한 디바이스 접근 장치는 하나의 마스터에 직렬 인터페이스를 통해 연결된 복수의 슬레이브 디바이스를 그룹 디바이스 어드레스를 사용하여 적어도 하나의 슬레이브 디바이스에 동시 접근하여 마스터로부터의 명령에 따라 읽기 및 쓰기 접속 명령을 처리한다.
Abstract:
본 발명은 멀티 프로세싱 유닛에 대해 각자 개별적으로 운용 가능하며, 메모리 어드레스 영역을 변경 가능한 멀티 프로세싱 유닛에 대한 메모리 매핑장치에 대한 것이다. 이를 위해 본 발명은 복수의 프로세싱 유닛과 복수의 메모리 사이를 정합하는 적어도 하나의 메모리 정합부, 각 메모리에 대한 억세스 제어, 및 중재를 수행하는 메모리 컨트롤러, 각 프로세싱 유닛에 대한 윈도우 맵을 구비하며, 윈도우 맵을 참조하여 각 프로세싱 유닛에 각 메모리를 대응시키고, 대응된 메모리의 어드레스 영역의 일 영역을 할당하는 메모리 매핑부, 및 각 프로세싱 유닛 중 어느 하나의 메모리 사용 요구에 응답하여 메모리 사용 요구가 발생한 프로세싱 유닛에 대해 윈도우 맵을 가변하는 윈도우 맵 가변부를 구비한다. 멀티 프로세싱 유닛, 윈도우 맵, 메모리, 어드레스 영역
Abstract:
PURPOSE: A memory mapping method for a multi processing unit and a device thereof are provided to minimize time delay, collision and bottleneck phenomena generated when each processing unit accesses a memory. CONSTITUTION: At least one memory matching unit(114,119,130) matches a plurality of processing units(102,104,106) with a plurality of memories. Memory controllers(107,108,109,126,127,128,129) perform access control and arbitration for each memory. The memory mapping unit maps one area of the entire address area of a corresponding memory. A window map varying unit varies a window map about a processing unit in which a memory use request is generated.
Abstract:
Provided is a memory switching control apparatus using an open serial interfacing scheme capable of enhancing flexibility, reliability, availability, performance in a data communication processes between a memory and a processing unit and an operating method thereof. The memory switching control apparatus includes: one or more processor interfacing units which perform interfacing with one or more processing units; one or more memory interfacing units which have open-serial-interfacing-scheme memory interfacing ports to interface with data storage devices connected to the memory interfacing ports in a serial interfacing scheme; and a plurality of arbitrating units which are provided corresponding to the memory interfacing units to independently arbitrate usage rights of the processor interfacing units to the memory interfacing units.
Abstract:
An apparatus and method for clock synchronization are provided to improve the frequency resolution of the clock by changing the phase of clock. The apparatus for clock synchronization comprises the clock generation board(100), the clock selection part(110), and the visual information generating unit(120) and an offset calculation unit(130). The reference clock is input to the clock generation board and the clock generation board outputs a plurality of clocks. A plurality of clocks has the different phase. The clock selection part outputs one among a plurality of clocks. The visual information generating unit produces the time related information of the selected clock. The offset calculation unit calculates the goal frequency offset. The frequency offset calculation is performed by using the visual information and sync message etc.
Abstract:
A memory switching control apparatus using open serial interface, operating method thereof, and a data storage device thereof are provided to resolve a bottleneck phenomenon due to a plurality of memory storage devices and a complexity of memory interface by using an open serial interface. A memory matching unit of a memory switching control device run matching line in a minimum speed(S101), and checks the number of matching lines being usable which are connected to the data storage device(S102). The memory matching unit checks the maximum line speed of the checked match line(S103). The memory matching unit operates all the match lines to the checked maximum line speed(S104). The memory matching unit checks out whether the basic operation of the operated lines is normal(S105), measures data delay for the each operated line, and adjusts entire matching line output timing through a compensation for delay between lines(S106). A corresponding memory matching unit performs a memory test through the setup matching line(S107). If the data storage unit being connected is normal, the memory matching unit allocates a system addressing space mapping to data storage device and terminates the initialization procedure after registering to memory port table(S109). If the data storage unit being connected is abnormal, the memory matching unit reports an error state and terminates the initialization procedure without allocation of system addressing space or registering(S110).