Apparatus and Method for Distribution Clock in Multiple Processing System based on Compact Peripheral Component Interconnect

摘要

PURPOSE: A device and a method for distributing clock of a compact PCI(Peripheral Component Interconnect) based multiprocessing system are provided to install a system board variably by minimizing the skew of the clock transferred from respective different slots even if position of the slot is varied. CONSTITUTION: A clock generator(11) generates the clock. A clock distributor(12) outputs the clock by distributing the clock applied from the clock generator(11). A plurality of variable delay lines(13a-13h) delays and transfers the clocks applied from the clock distributor(12), and varies the delay lines. A plurality of first buffers(14a-14g) switches the output to other slot for the clock applied through the variable delay lines(13a-13h). The second buffer(15) buffers and outputs the clock applied from the variable delay lines(13a-13h) for an internal use clock. A multiplexer(16) selects one from the clock applied from the second buffer(15) and other slot, and outputs it as the clock used inside of the board. A clock driver configuration logic(17) controls an operation of the variable delay lines(13a-13h), the first buffers(14a-14g), and the multiplexer(16).