Thank you , for your reply. I built the circuit with the chip philips pcf8583, the pin 1 osc1, and the pin 2 osc0, I put the crystal 3.2760 and the pin 1 I put the capacitor 5-25 pf + 5 v, but I change the capacitor 22 pf, but nothing, I think is necesary programming the commands for running this chip. I programming only read date and time from pic, no write to new time, date. Please if you have diagram, or ex. this pcf8583 please send me. Thank you very much
Carlos from Canarys Islands