| 摘要 |
PURPOSE: A method and a system for controlling an inductive clock in a synchronous optical communication device are provided to operate a system clock and an inductive clock respectively by using a timing signal. CONSTITUTION: A synchronous source operating system is formed with a control portion(505), the first clock generation portion(501), the second clock generation portion(502), and a DPPLL(503). The third clock selection portion controls the first and the second external clocks(ELK1,ELK2), an E line clock(ELK), a W line clock(WCLK), an internal clock(CLK) according to a control operation of the control portion(505). A PLL(Phase Locked Loop)(507) generates a stable output by locking a clock selected from the third clock selection portion(506). A bidirectional buffer outputs the stable output of the PLL(507) to the first and the second clock output ports(ECOP1,ECOP2) or the first and transfer an input of the second external input ports(ECIP1,ECIP2) to the first clock selection portion(501).
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