Thank you very much for your help, I see the problem in my circuit with pcf8583 rtc, the problem was crystal, this crystal, I have two crystal, no run ok, I looking for a crystal in old circuit time electronic, and see one crystal, I put this crystal in my circuit and now run ok, but I have a problem with the address for print year, and weekday, please tell me the address for print the time,date this device. Thank you again
aguere from Canarys Islands
