I'm on the search again for a microcontroller for a project.

Has anyone got a reference to a selector guide which covers the features of
a wide range of avail;able processors in a single place. Everyone is happy
(enough) to tell you what they sell but you can spend a lot of time looking
for all reasonable alternatives.

FWIW my spec is

Cost sensitive - ideally <= $US1 in 10k quantity

MUST have 1 channel of 5 kHz real-time PWM capability. Resolution COULD be
as low as around 5% steps but finer would be better (say 8 bits). [5 kHz at
5% duty cycle is 10 uS per step so one might ALMOST do this in software with
a suitably fast cpu but as there are several realtimish tasks a timer based
PWM is much preferred]. A second PWM channel would be nice but is not
essential.

A2D (8 bit OK) would be extremely desirable but not strictly essential

Flash would be nice but OTP ok

EEROM would be nice but not essential

RC clock operation desirable.

Anti brownout and inbuilt power on reset desirable.

Cost sensitive

UART nice but not ....

IIC not really needed but if it was there ...

Code memory of 1K probably OK.

Limited RAM needed.

Cost sensitive ... :-)

SOIC packaging for production. Availability of DIP for initial prototyping
would be useful.

Reasonable (ie low $ or free :-) ) priced development tools desirable.
Assembler OK, free or cheap C etc would not be unwelcome.

OTP / Flash and mask versions would be useful.

Manufacturer not in Chapter 11 or any variant thereof would be nice :-)

Technically responsive supplier would be useful.


My feeling is that any PIC which meets the hardware spec tends to fail the
price spec.






      Russell McMahon
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