针对数字信号处理器与其他微处理器的不同之处，文中着重介绍了等待状态发生逻辑电路及数字信号处理器与外部芯片的数据接口电路。
In view of the disparity among DSP and other microprocessors, the logic circuit in waiting requisition and the data exchanging interface among DSP and external chips is offered.
操作表示机是计算机联锁系统中关键的人机界面设备，硬件上利用继电器组成的逻辑电路，实现双机热备的倒机逻辑控制和设备接口电缆的动态切换。
Therefore it is necessary to perfect the existing relay equipment based on the rule of fault-safety in order to achieve the function of railway signal computer-based interlocking control system.
本文介绍了一种特殊的硬件实现方法，使用了管脚少、成本低、容易得到的逻辑接口器件，例如可编程逻辑阵列（PAL）、可编程逻辑电路（CPLD）或者FPGA。
The article introduces a unique hardware realization, which utilizes less-foot, low-cost and easy-to-get logistic interfaces, as PAL, CPLD or FPGA.
本文介绍了一种特殊的硬件实现方法，使用了管脚少、成本低、容易得到的逻辑接口器件，例如可编程逻辑阵列（PAL）、可编程逻辑电路（CPLD）或者FPGA。
The article introduces a unique hardware realization, which utilizes less-foot, low-cost and easy-to-get logistic interfaces, as PAL, CPLD or FPGA.
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