This paper describes the principle and process about the local loop-back test on the FCC of MPC8260 microprocessor, including the setting of all the registers and the setup of FCC.

本文详细描述了MPC8260处理机芯片的FCC内环测试的原理和实现流程，并给出了所有的相关寄存器的设置。

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Moreover, existing testing methods such as Loop-back test method (LTM) and Transverse test method (TTM) are not catered for testing modern routers with multi-ports.

此外，现有的测试方法，诸如“回绕测试法”(LTM)和“穿越测试法”(TTM)都不适合于测试具有多个端口的现代路由器。

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