indie New Member Aug 23, 2004 #1 i'm working with pic16f84a with 20MHz x'tal on it, if i change the oscillator to 4 MHz x'tal (or anything less than 20 MHz x'tal) , what will happen??
i'm working with pic16f84a with 20MHz x'tal on it, if i change the oscillator to 4 MHz x'tal (or anything less than 20 MHz x'tal) , what will happen??
Exo Active Member Aug 23, 2004 #2 everything will happen slower... Program execution speed depends on the crystal, a pic does Fosc/4 inctructions every second (except branches wich take double the time). So at 20Mhz a pic does 5000000 instructions /sec A 4Mhz it does 1000000.
everything will happen slower... Program execution speed depends on the crystal, a pic does Fosc/4 inctructions every second (except branches wich take double the time). So at 20Mhz a pic does 5000000 instructions /sec A 4Mhz it does 1000000.
Oznog Active Member Aug 23, 2004 #3 Power consumption will drop to about 1/5th what it was before. You may need to change your fuse bit settings for the oscillator type, check your spec sheets.
Power consumption will drop to about 1/5th what it was before. You may need to change your fuse bit settings for the oscillator type, check your spec sheets.
indie New Member Aug 24, 2004 #4 is there any different between analog oscillator with PIC oscillator??