Microchip PIC microcontroller interrupt timing interval chart.

Microchip PIC microcontroller interrupt timing interval chart.

Download Excel 95 file here.

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Notes:

Change the Crystal value to match your crystal clock speed.

PSA = 0 is for External crystal OSC

PSA = 1 is for Internal WDT OSC

PSA	PS2	PS1	PS0	Prescale	Crystal	Interrupt Interval	Interrupt Interval
						(in seconds)	(in cycles)
0	0	0	0	2	4000000	0.000512	512
0	0	0	1	4	4000000	0.001024	1024
0	0	1	0	8	4000000	0.002048	2048
0	0	1	1	16	4000000	0.004096	4096
0	1	0	0	32	4000000	0.008192	8192
0	1	0	1	64	4000000	0.016384	16384
0	1	1	0	128	4000000	0.032768	32768
0	1	1	1	256	4000000	0.065536	65536
1	0	0	0	1	4000000	0.000256	256
1	0	0	1	2	4000000	0.000512	512
1	0	1	0	4	4000000	0.001024	1024
1	0	1	1	8	4000000	0.002048	2048
1	1	0	0	16	4000000	0.004096	4096
1	1	0	1	32	4000000	0.008192	8192
1	1	1	0	64	4000000	0.016384	16384
1	1	1	1	128	4000000	0.032768	32768

_{Copyright 2002, Cliff
Griffin}