行線接P1.0－P1.3，列線接P1.4－P1.7。





根據掃瞄鍵盤返回的鍵值編碼查鍵值編碼表，從而得到鍵值並送數碼管顯示。



開機時，數碼管顯示「－」。



當鍵按下時，數碼管顯示按下鍵的鍵值，蜂鳴器響一聲。-The row line then P1.0-P1.3, P1.4-P1.7 column line access. Check returned under the scanner keyboard key coding key value coding table, so as to get the keys and send digital display. Power, digital display " -" . Press the key value of the key when the key is pressed, the digital display, the buzzer sounds.