| 摘要 |
PURPOSE: An arbitration device for sharing an ADSL(Asymmetric Digital Subscriber Line) code in an ADSL subscriber board is provided to read the ADSL code stored in a booting/storing flash memory using an arbitration logic embodied in an EPLD(Erasable Programming Logic Device), store the read ADSL code in an external SRAM, and read and write the corresponding ADSL code using a pair of quad-type ADSL DSPs(Digital Signal Processors). CONSTITUTION: A booting/storing flash memory(100) boots an entire board, and temporarily stores an ADSL code in a memory region of an empty space. A host processor(200) receives ADSL data, and outputs the received ADSL data to an upper terminal. An EPLD(300) receives a control signal from the host processor(200), reads the ADSL code temporarily stored in the booting/storing flash memory(100), and outputs the read ADSL code. An external SRAM(400) receives the ADSL code from the EPLD(300) through an internal bus, and stores the received ADSL code. A pair of quad-type ADSL DSPs(500) output an SRAM request signal, connect to the external SRAM(400), read the corresponding ADSL code among ADSL codes stored in the external SRAM(400), and perform a processing operation corresponding to the read ADSL code. The pair of quad-type ADSL DSPs(500) receive ADSL data, and output the received ADSL data.
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