On Fri, Nov 14, 2014 at 03:22:52PM -0500, John J. McDonough wrote:
> On Sat, 2014-11-15 at 08:44 +1300, IVP wrote:
>=20
> > The F87 is already a pretty good jellybean micro.
>=20
> Before the enhanced 16F's, the 87/88 was top of the line for 18 pin
> 16Fs.  Besides the most memory, most EEPROM, and pretty much all the
> peripherals, it has power saving features that aren't in a lot of the
> 16Fs.
>=20
> But everyone has been asking the right questions ... do you want a pin
> for pin drop in?  How much software work are you willing to do?  Does
> another part have some capability you would use?  Some of the newer
> parts have some pretty cool peripherals, but if you can't use them then
> they don't matter.
>=20
> And Joe asks about another family.  The 18Fs are a little easier to work
> with than the 16Fs, but the 16 and 32 bit parts take that to a whole new
> level.  And if you can deal with 3 volts, some of the PIC24s are cheap
> even compared to the PIC16s.  Unfortunately, if you need 5 volts the
> dsPIC30 series is the only choice, and they tend to be a little pricey,
> although not so much of an issue for small quantities, and the ease of
> development is miles better than the 8 bit parts.

Not exactly true. The PIC24FV series incorporates a internal voltage
converter and I/O level shifters. So on the outside it's a 5V chip that
operates with a 3.3V core.

I've upgraded my lineup almost exclusively to the PIC24FV32KA302 and
PIC24FV16KM202 parts. Both are 28 pin skinny dips. The KM parts
specifically have enhanced analog peripherals (opamps, enhanced 12 bit ADC,
enhanced PWM) specifically for motor control type applications.

BAJ

>=20
> Soooo, look to your application for answers.
>=20
> --McD
>=20
>=20
>=20
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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
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