On Tue, Apr 15, 2014 at 01:35:18PM -0400, Larry Bradley wrote:
> Josh:
>=20
> The 24FJ64GB002 that comes with the kit has an 8mHz internal osc. But it
> also has a PLL and some dividers that can be user to increase the CPU
> clock speed to a max of 32 mHz. I've not delved too far into the beast
> yet, but it appears that the CPU instruction cycle requires 2 clock
> cycles, unlike the 18F series which require 4. Thus a 32 mHz clock will
> result in 32 mips. A 40 mHz 18F is only 10 mips.
>=20
> It also comes with a 24HJ64GP502, a dsPIC 33FJ64MC802, and a
> PIC32MX250F128B.

Larry is pretty much on point. Only misstep is that a 32 Mhz clock at 2
cycles/instruction is 16 MIPS, not 32 MIPS.

I've tested all of these modes with my current PIC24FV16KM202 setup. It
does crank out 16 MIPS at full speed.

BAJ

> --=20
> Larry Bradley =20
> Orleans (Ottawa) Canada=20
>=20
> On Tue, 2014-04-15 at 12:04 -0400, Josh Koffman wrote:
>=20
> > O
> >=20
> > Interesting. I am hoping to play with some of the WS2812 LEDs (with
> > built in controllers), which have a bit of an oddball timing
> > requirement, making them tricky to drive on a micro that has a bunch
> > of other tasks to perform. I'm hoping that by using a chip with a high
> > enough instruction clock I will be able to do some useful work while
> > still driving the LEDs. So...MIPS are important!
> >=20
> > >
> --=20
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--=20
Byron A. Jeff
Chair: Department of Computer Science and Information Technology
College of Information and Mathematical Sciences
Clayton State University
http://faculty.clayton.edu/bjeff
--=20
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