Hi, PICLISTers, I am using MPLAB to simulate a simple project: I have to make a termometer with PIC16C715 (it has more program memory & RAM). I initialize ADCON0 to 0x01 (ADON = 1, A/D conversion clk = Fosc/2) and ADCON1 to 0x01 (RA3 <- Vref) then I set ADCON0.GO bit and wait for this GO bit to get cleared. but this never happens nor PIR1.ADIF bit gets set. Previous project was with PIC16C74A with ADC and the simulation was successful. Have anyone had such problem ? Is this my mistake or of MPLAB ? Ivan Cenov OKTO-7 okto7@botev.ttm.bg