病房呼叫系统设计具有病房呼叫、报警与对讲的功能。本系统硬件采用单片机AT89S51芯片，LED数码管和键盘，辅以必要的电路，软件以汇编程序设计,构成一个简单的单片机病房呼叫电路。本系统由5.0V直流电源供电，由按键按下提供脉冲，通过发光二极管显示呼叫的病床号，8段数码管进行计数，然后由护士台操作复位。-Ward with ward call call system, alarm and intercom functions. The system hardware uses microcontroller AT89S51 chip, LED digital tubes and keyboard, combined with the necessary circuitry, software assembler design, constitute a simple microcontroller circuit ward call. The system consists of 5.0V DC power supply, press the buttons provided by the pulse, through the light-emitting diode display the call number of beds, 8 digital tube count, and then reset operation by the nurses station.