Oh ok. The clock should be counter overflow. but why u said it can only measure 21 m? i thought is 25.2m since the delay time is up to 83.75ns.
There are two pins which i do not know where should i connect to and for what purposes could it be. THe pins are Q, D. I have attached a pic on the connection for the DS1124 , please help me check is it ok.
By the way, what instruction can we use to program it? The datasheet did not provide such info. Can u send me the link?