Hi,

I have previously used PIC microcontrollers for a small video related product. I have always used the PIC16F84

I am now looking to superimpose some graphics onto a video signal using a PIC, a cross hair graticule. The problem is that the resolution required for the graphics is ~100ns, so I would want to clamp the video for 100ns. With a 16F84A @20MHz the fastest instruction cycle will be 200ns.

I realise that I could use one of the faster pic 18 series running at 40Mhz to reduce the instruction cycle, thus allowing me to get closer to the 100ns resolution. I have never used any of this series before. Can anyone tell me of any major problems that moving to these higher level devices my create?

Or is anyone aware of any techniques to get closer to a 100ns resolution?

Thank you very much for your help.

Regards,
Daniel Sweet

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