1、　　编程完成电子钟的程序，要求在实验箱BANK3部分数码管上显示一电子钟，显示格式为“小时—分钟—秒”，上电时显示“23—59—50”。

2、　　根据实验箱BANK3部分电路，完成一数字频率计。检测T0口上所接的信号的频率，T0口上所接信号的频率值为10—250Hz，可以将定时/计数器T0设置为计数器模式，定时/计数器T1设置为定时器模式，定时1秒，取出计数器中的数字，显示在数码管上即可完成。

-Programming is complete electronic clock procedures require an electronic clock display on the digital tube in the experimental box BANK3 part, the display format for hours- minutes- seconds "power on" 23-59-50 ".

2, according to the the experimental box BANK3 part of the circuit, the completion of a digital frequency meter. Detect T0 mouth then signal the frequency the T0 port connected to the frequency of the signal value 10-250Hz, timer/counter T0 can be set to counter mode, timer/counter T1 is set to timer mode, timing 1 second, remove the counter in the digital display to complete the digital tube.